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Organization

Established in 2019, GMILab Geotechnical and Material Investigation Laboratory Limited is a leading material testing laboratory & research facility. We successfully cater to the needs of industry leaders in material testing for all types of civil engineering projects. We also offer specialized research services for typical field problems. Our newly build laboratory is equipped with the latest advanced test equipment duly calibrated for accurate and reliable testing of soil, aggregate and concrete for buildings, roads, bridge and other civil engineering infrastructure projects. Our core testing team possesses a vast experience of material testing, quality control and quality audit for numerous civil engineering projects with Government, semi Government and private sector organizations. Our ability to invest manpower, resources and modern technology is reflected in the high standard of our work. At GMILab we adopt the most recent advancement in our field of applications. Testing work is undertaken by a dedicated team of technicians and external specialists who have a wide range of experience in material testing, investigation and consulting.

GMILab’s Mission

To provide reliability, honesty, professionalism and excellence in material testing through adoption of standard procedures, modern equipment and innovative techniques

GMILab’s Motto

“Worth building, worth testing”

GMILab’s Vision

To be the leading laboratory in geotechnical and material investigation, testing and research

Ground and Site Investigation

Ground and Site Investigation

Geotechnical Soil and Rock Testing

Our in-house laboratories are equipped to provide comprehensive geotechnical soil, rock and groundwater testing services which meet the appropriate British and American Standards. Soil and groundwater testing is used for classification of materials. These tests include Moisture Content, Atterberg Limits, Bulk Density, Dry Density, Particle Size Distribution (PSD or Grading Analysis), Particle Density (Small Pyknometer and Gas Jar), as well as Sulphate Content and Triaxial Tests, but wide range of geotechnical soil testing is available.
Classification Testing
Natural Moisture Content; MCNatural Moisture Content; MCThe mechanical properties of a soil often depend on their moisture content and the test is used in assessment of soil profiles, strength, drying etc.
PSD Grading by Wet & Dry Sieve MethodsBS1377-2:9.2 & 9.3 & BS EN ISO 17892-4Particle size expresses the size of the particles comprising a soil in terms of percentages by weight of individual sizes. This analysis is used for classification of sands and gravels and coarser particles. This can be related to the mechanical properties of the material e.g. suitability as a fill material, permeability etc.
PSD by Pipette Method (sedimentation)BS1377-2:9.2 & 9.3 & BS EN ISO 17892-4Used in conjunction with a sieve analysis to determine the silt and clay content of a soil. Used in the classification of soil and assessment of their mechanical properties.
Particle Density; PD or Specific Gravity; SGBS1377-2:8 & BS EN ISO 17892-3Used for the determination of porosity and voids ratio. Frequently used in road construction in the determination of the state of compaction of fill materials.
Used for the determination of porosity and voids ratio. Frequently used in road construction in the determination of the state of compaction of fill materials.BS1377-2:7 & BS EN ISO 17892-2The density of soils depends on the density of the solid particles, on the porosity and the moisture content. The dry density is used in the evaluation of porosity and voids ratio. It is frequently used in road construction for the determination of the state of compaction of fill material.
Plasticity Index (Atterberg Limit Test); PL, LL & PIBS1377-2:4 – 5 & BS EN ISO 17892-12The properties of cohesive soils are strongly influenced by the mineralogy of the clays. These tests along with moisture content are used for classification and to assess mechanical properties and are used for Earthworks Materials, Volume Change potential, drying etc.
Chemical Testing
pH valueBS1377-3:9.5A measure of the acidity/alkalinity of soil and groundwater. Concrete that is subject to highly mobile acid (low pH) water can deteriorate rapidly. This is assessed for concrete design.
Sulphate ContentBS1377A measure of the sulphate content of soil and groundwater. These sulphates can attack concrete leading to its deterioration. This is assessed for concrete design.
Organic ContentBS1377-3:3 & 4Derived from the decomposition of plant, animal and bacterial life. The organic material shows high water absorption and strongly influence mechanical properties especially strength and settlement behaviour.
Chloride ContentBS1377-3:7This test measures chloride content of soil and water. Only very high concentrations affect unreinforced concrete but could attack steel at lower concentrations.
Performance Testing
Dry Density Moisture Content Relationship (Compaction); DD/MC, OMC & MDDBS1377-4:3This test measures the dry density of the compacted soil in relationship to moisture content depending on the manner of the compaction effort. Compaction influences the shear strength and compressibility of the soil and is frequently used in earthworks and road construction.
Laboratory Californian Bearing Ratio; CBRBS1377-4:7Used for the evaluation of sub-grade strength in road design. The test measures the load required to cause a plunger to penetrate a specimen of soil. Although an arbitrary test it is an indirect measure of strength. Not suitable for materials with more than 25% of particles larger than 20mm.
Consolidation Testing
One Dimensional Consolidation (Oedometer)BS1377-5:3 & BS EN ISO 17892-5The rate and degree of settlement from a proposed structure is estimated from this small-scale laboratory test for soil investigation. A soil sample is compressed within a metal mould sandwiched between porous plates. A change in thickness is measured at different loads.
Swelling PressureBS1377-5:4 & BS EN ISO 17892-5In the oedometer swelling potential can be assessed
Shear Testing
Immediate Undrained Shear boxBS1377-7:4 & BS EN ISO 17892-10Undrained estimates of the shear strength of soils can be measured under different normal stresses. In the shear box failure is caused in a predetermined plane of the soil. True immediate tests cannot be made in material not fully saturated or in more permeable soils.
Consolidated Drained Shear boxBS1377-7:4 & BS EN ISO 17892-10The soils in the shear box are allowed to consolidate under a vertical load and then sheared slowly. The results are usually used in assessment of slope stability and retaining wall design.
Laboratory VaneBS1377-7:3The torque required to cause shearing of soil from twin blades fixed at right angles. The test allows the measurement of shear strength for foundation design and road pavements. They can assist in stability of earthworks.
Triaxial Testing
Quick Undrained TriaxialBS1377-7:8A soil sample is subjected to three stresses at right angles with the vertical stress increased until the specimen fails. The test results are used for the design of conventional and piled foundations but can also be used in short term stability of slopes and underground openings.
Effective Stress Testing
Isotropically Consolidated Undrained TestBS1377-8:7An effective strength test where the sample is consolidated to a mean effective stress and the undrained strength and pore water pressure is measure. In an undrained test the volume remains constant. Stability of slopes and design of retaining structures.
Isotropically Consolidated Drained TestBS1377-8:8This test is for the long-term condition of the above test. This is usually carried out in sands and free draining materials. In the drained test the pore pressure remains constant but the volume may change. Stability of slopes and design of retaining structures.
Permeability Testing
Direct Measurement of Permeability under Constant HeadBS1377-5 & 6Measures the coefficient of permeability usually in cohesive soils in the Triaxial apparatus. This is frequently used in the assessment of permeability in compacted soils in landfill and road construction.
Rock Testing
Measurement of Uniaxial Compressive Strength; UCSISRM Part 1 2007The rock/soil strength is determined from a uniaxial compressive strength on a cylindrical specimen. Often used to assess the strength of rock for foundation design. The strength can also be used on the stability of rock slopes and underground openings. It should be noted that this strength only refers to the solid parts of a rock mass.
Point Load; PLISRM 2007Where uniaxial strengths cannot be directly measured the point load tests offers a possible alternative method of assessment.

The above tables do not list all available tests. Want to find out more about our geotechnical soil testing services? Please contact our laboratory manager to discuss your site investigation testing requirements.

Aggregates and Earthworks Testing

Our in-house laboratories are equipped to provide comprehensive aggregates and earthworks testing services which meet the appropriate British and American Standards. As well as completing standard laboratory, grading, compaction and classification earthworks testing, we also provide engineering advice and assistance with the design and specification for a variety of earthworks operations, as well as undertaking on site monitoring and in-situ testing. Mechanical, physical and chemical testing is undertaking for a variety of Clients on a wide range of natural and recycled aggregates to ensure they are fit for purpose. We also offer a thorough on-site material assessment and sampling service.

Earthworks Testing

Natural Moisture ContentBS1377-2:3 & BS EN ISO 17892-1The mechanical properties of a soil often depend on their moisture content and the test is used in assessment of soil profiles, strength, drying etc.
Plasticity Index (Atterberg)BS1377-2:4 & 5 & BS EN ISO 17892-12The properties of cohesive soils are strongly influenced by the mineralogy of the clays. These tests along with moisture content are used for classification and to assess mechanical properties and are used for Earthworks Materials, Volume Change potential, drying etc.
Particle DensityBS1377-2:8 & BS EN ISO 17892-3Used for the determination of porosity and voids ratio. Frequently used in road construction in the determination of the state of compaction of fill materials.
Bulk & Dry DensityBS1377-2:7 & BS EN ISO 17892-2The density of soils depends on the density of the solid particles, on the porosity and the moisture content. The dry density is used in the evaluation of porosity and voids ratio. It is frequently used in road construction for the determination of the state of compaction of fill material.
Grading to ‘Highways’BS EN 933-2, BS 1377-2 & BS EN ISO 17892-4A particle Size Distribution (PSD) test used for grading of aggregates and earthworks materials to determine suitability using Grading Limits and Coefficient of Uniformity.
PSD by Pipette Method (sedimentation)BS1377-2:9.2, 9.3 & BS EN ISO 17892-4Used in conjunction with a sieve analysis to determine the silt and clay content of a soil. Used in the classification of soil and assessment of their mechanical properties.
Dry Density Moisture Content Relationship (compaction)BS1377-4:3This test measures the dry density of the compacted soil in relationship to moisture content depending on the manner of the compaction effort. Compaction influences the shear strength and compressibility of the soil and is frequently used in earthworks and road construction.
Aggregates Testing
Presence & ID of AsbestosHSG 248/RECASB01Required before carrying out Laboratory Testing on materials derived from demolition waste such as Recycled Aggregates (RA).
Particle Identification (Clause 710)BS EN 1097-2Determines resistance to fragmentation of aggregates
Micro Deval AbrasionBS EN 1097-1Determines resistance to wear of aggregates.
Sulphate & Oxidizable Sulphides ContentTRRL 447 1, 2 & 4Limits are set on how close a material bearing sulphates and sulphides can be to concrete and steel members in earthwork structures.
Topsoil Compliance including Contamination SuiteBS3882:2015Determines the suitability of a topsoil for various applications.

The above tables do not list all available tests. Please contact us to discuss your site investigation testing requirements.

Construction Materials Testing

Our in-house laboratories are equipped to provide comprehensive construction materials testing services which meet the appropriate British and American Standards. We commonly carry out Concrete Cube and Concrete Core compressive strength testing as well as mechanical, physical and chemical testing of natural and recycled aggregates to ensure they are fit for purpose. A wide range of other construction materials testing is available. Materials testing capabilities offered through external laboratories also include void content of core sample, PRD tests, blacktop analysis, binder recovery, bitumen penetration and bitumen softening point. We also offer a thorough on-site material assessment and sampling service.

Concrete Cube Compressive StrengthBS EN 12390-3Determines the strength of hardened 100 – 150mm concrete cubes usually at 7, 14 and 28 days after casting. Used as quality control during construction of concrete structures.
Depth of Carbonation (by Phenolpthalein indicator)BS EN 14630This test is used to establish whether the pH of concrete has reduced. A lower pH can allow corrosion of reinforcement.
Sulphate ContentBS1881-124Used to assess whether concrete in a structure is likely to have been attacked by sulphates.
Chloride ContentBS1881-124Used to assess whether concrete in a structure is likely to have been attacked by chlorides.
Presence & ID of AsbestosHSG 248/RECASB01Required before carrying out Laboratory Testing on materials derived from demolition waste such as Recycled Aggregates (RA).
Grading to ‘Highways’BS EN 933-2 & BS1377-2A particle Size Distribution (PSD) test used for grading of aggregates and earthworks materials to determine suitability using Grading Limits and Coefficient of Uniformity.
Particle Identification (Clause 710)MCHW Cl. 710Determines the composition of Recycled Aggregates (RA)
Los Angeles Abrasion (LA)BS EN 1097-2Determines resistance to fragmentation of aggregates
Micro Deval AbrasionBS EN 1091-1Determines resistance to wear of aggregates.

The above tables do not list all available tests. Please contact our laboratory manager to discuss your site investigation testing requirements.

Concrete Testing

Our in-house laboratories are equipped to provide an extensive range of concrete testing and related materials testing services which meet the appropriate British and American Standards. Typical testing includes compressive strength of concrete cubes and cores. We provide an on-site service to facilitate the sampling and making of concrete test cubes in clean, oiled steel moulds as well as a collection service. All cubes are appropriately cured, on receipt, in readiness for testing at our laboratory. Our laboratory also provides chemical testing to assess the risk of attack on buried concrete from aggressive ground conditions arising from sulphates and/or acidic soil. Additional technical advice and assistance is also available from our team of professional geotechnical and civil engineers.
Concrete Cube Compressive StrengthBS EN 12390-3Determines the strength of hardened 100 – 150mm concrete cubes usually at 7, 14 and 28 days after casting in cleaned, oiled steel moulds. Used as quality control during construction of concrete structures
Concrete Core Compressive StrengthBS EN 12504-1, 12390-3 & 12390-7Used to assess the strength of concrete in existing structures.
Depth of Carbonation (by Phenolpthalein indicator)BS EN 14630This test is used to establish whether the pH of concrete has reduced. A lower pH can allow corrosion of reinforcement.
Sulphate ContentBS1881-124Used to assess whether concrete in a structure is likely to have been attacked by sulphates.
Chloride ContentBS1881-124Used to assess whether concrete in a structure is likely to have been attacked by chlorides.

The above tables do not list all available tests. Please contact us to discuss your site investigation testing requirements.

Ground and Site Investigation

Geotechnical Investigation

Site investigation can be regarded as an essential part of the preliminary design of any construction project which determines the geological (geology), engineering (soil and rock mechanics), hydrological (groundwater) and environmental (contamination) characteristics of the ground. It is fundamental to safe, efficient and economic development. We ensure that the ground investigation is designed and implemented correctly to meet the project requirements. Where necessary, our multi-disciplined teams are able to integrate the scope of works to cover both geotechnical and environmental concerns in order to provide a technically robust and cost-effective site investigation solution. We provide both factual and interpretive reports. Ground Investigation Reports (GIR) and Geotechnical Design Reports (GDR) are provided to meet the requirements of Eurocode 7 (EC7). We have established a reputation for analyzing the problem and delivering solutions and design reports of unrivalled quality and clarity

Our key areas of site investigation geotechnical consultancy include:

Foundations and Substructure

We are able to provide both engineering analysis and design solutions for the range of simple to more complex foundation problems. For example, using our suite of geotechnical software we are able to carry out an analysis of foundation settlement of individual and “overlapping” foundations. We are also able to analyze soil displacements resulting from soil unloading when constructing basements. Our areas of work include:

Slopes and Retaining Structures

We have a wealth of experience investigating slopes which have either failed naturally, or where a risk of slope failure has been recognized on engineering works. Slope failure can occur in natural circumstances or as a result of poorly designed engineering works. Examples of natural slope failures are seen when groundwater conditions change and when erosion occurs. Examples of failure due to poor engineering design are seen where cuttings are made into slopes particularly where pre-existing slip surfaces exist, slopes are surcharged, changes are made in groundwater regimes, or where vegetation / tree cover is removed. Our ground investigation engineering and technical team has experience in:

Soakaways

Soakaways are used to collect surface runoff prior to being discharged into the surrounding soil. They are usually employed in areas where the surface run-off cannot be disposed into existing streams or ditches. A conventional soakaway comprises a partially perforated cylindrical chamber, which allows the drainage of water into the surrounding soil. Where the soakage must take place at depth a deep bored liner is used. Here the water is transported from a sealed storage chamber to the soakage medium by a small diameter plastic or steel pipe, again perforated in part. There are a number of site investigation permeability tests for determining whether soakaways may work effectively. These range from small to large scale. Small-scale tests are only applicable to draining relatively small areas. We have our own ground investigation plant and equipment and can offer the following test methods:
Sustainable drainage systems (also known as SUDS) offer an alternative approach to traditional drainage. SUDS employ alternative techniques for the effective management of drainage at source including swales, detention/attenuation ponds, permeable pavements, rainwater harvestings and integrated constructed wetlands, all of which aim to detain run-off and release it slowly into watercourses or to ground

Soakaways

Soakaways are used to collect surface runoff prior to being discharged into the surrounding soil. They are usually employed in areas where the surface run-off cannot be disposed into existing streams or ditches. A conventional soakaway comprises a partially perforated cylindrical chamber, which allows the drainage of water into the surrounding soil. Where the soakage must take place at depth a deep bored liner is used. Here the water is transported from a sealed storage chamber to the soakage medium by a small diameter plastic or steel pipe, again perforated in part. There are a number of site investigation permeability tests for determining whether soakaways may work effectively. These range from small to large scale. Small-scale tests are only applicable to draining relatively small areas. We have our own ground investigation plant and equipment and can offer the following test methods:
Sustainable drainage systems (also known as SUDS) offer an alternative approach to traditional drainage. SUDS employ alternative techniques for the effective management of drainage at source including swales, detention/attenuation ponds, permeable pavements, rainwater harvestings and integrated constructed wetlands, all of which aim to detain run-off and release it slowly into watercourses or to ground

Earthworks and Ground Improvement

The majority of projects normally require some form of ‘cut and fill’ activity in order to create a level development platform. A critical factor is optimizing the design of earthworks and ground improvement to minimize the cost of import or export of bulk materials from site and limiting the environmental impact of the works. Our ground investigation expertise in earthworks includes; classification of soils, optimization of design, determination of soil compaction parameters, specification of fill materials, site supervision, quality and performance control through in-situ testing and monitoring, instrumentation, analysis of settlement characteristics and design of cut and fill slopes. By combining our wide range of site investigation experience and knowledge, we have designed innovative schemes for residential, commercial and highway schemes. Our designs combine ground improvement techniques such as the use of lightweight fills, wick drainage, surcharging, lime or cement stabilisation, soil mixing, vibro improvement and dynamic compaction to provide cost effective solutions.

Tailored Services

GMILab seeks to provide individual solutions to individual problems. Tailored solutions are prepared for a variety of clients whose diverse needs extend to all areas of development and construction. We provide a wide range of specialist services though our company associates and partner organisations which complement our work in our core disciplines of ground investigation, geotechnical and environmental consultancy. Additional specialist services include
Through this network of associates, we have the resources, experience and technical management to deliver the widest range of project services. By combining in-house geological, ground investigation, geotechnical, environmental and contaminated land expertise with these specialist services, we can provide integrated solutions giving our clients a ‘one stop shop’ for site investigation.

KEY STAFF

Assoc. Prof. Umaru Bagampadde

A qualified professional civil engineer with experience in geotechnical engineering. He has good practical, training, research and administrative experience acquired over the last 20 years since 1994. Eng. Dr. Bagampadde holds a PhD degree in Engineering awarded by the Royal Institute of Technology, Stockholm, Sweden in 2005 and a Master’s degree in Engineering which was awarded by the University of Petroleum and Minerals, Dhahran, Saudi Arabia. All these were obtained after he acquired a Bachelor’s degree in Civil Engineering (First Class Honours) of Makerere University Kampala, Uganda. He is currently an Associate Professor and Dean, School of Engineering, College of Engineering, Design, Art and Technology, Makerere University. He is an active Consultant with the university and other firms. Research and Consultancy are carried out mainly in the fields of design and testing of materials (geo, oils and binder materials); structural design of engineering structures; feasibility study, planning, design and management of infrastructure; environmental impacts of engineering projects. A number of publications have been published regionally and internationally. Several Graduate students have been supervised to completion. He is a registered professional engineer with the Engineer’s Registration Board (ERB) and a corporate member of the Uganda Institution of Professional Engineers (UIPE) in good standing.

Eng. Samuel Jjuuko

A qualified civil engineer with experience in Geotechnical Engineering. He has good practical, training, research, and administrative experience acquired over the last 10 years since 2010. Samuel Jjuuko holds a Master of Science degree in Engineering specializing in Geotechnical Engineering, which was awarded by the University of Cape Town, Cape Town, South Africa. This was obtained after he acquired a Bachelor of Science degree in Civil Engineering (First Class Honours) of Makerere University Kampala, Uganda. He is currently an Assistant Lecturer, Department of Civil and Environmental Engineering, School of Engineering, College of Engineering, Design, Art and Technology, Makerere University. He is an active Consultant with the university and other firms. Research and Consultancy are carried out mainly in the fields of geotechnical and materials engineering; structural design of engineering structures; feasibility study, planning, design, and management of infrastructure; environmental impacts of engineering projects. A number of publications have been published regionally and internationally. Several Undergraduate and Graduate students have been supervised to completion. He is a Provisional Corporate Member of the Uganda Institution of Professional Engineers (UIPE) in good standing. Jjuuko is computer literate and can work well with MS office packages (MS Word, MS Excel, Power point presentation, etc.), Internet explorer and several professional packages including:

Dr. Robinah Kulabako

Robinah NAKAWUNDE KULABAKO holds a BSc. Civil Engineering degree from Makerere University and an MSc. in Environmental Engineering from University of Manchester (UK), a Technical Licentiate (Tek.Lic.) from the Royal Institute of Technology (KTH) in Stockholm, Sweden and a Doctor of Philosophy (Environmental Engineering) that was undertaken in a sandwich programme between Makerere University, Kampala, Uganda and the Royal Institute of Technology (KTH), Stockholm, Sweden. She is currently a senior lecturer and Chair of the Department of Civil and Environmental Engineering, School of Engineering, Makerere University, Kampala, Uganda. She teaches in the field of Public Health and Environmental Engineering. Dr. Kulabako has expertise in water supply, wastewater and excreta management, water/wastewater quality monitoring and assessments, sanitation and solid waste management. She also has major interest in pollution control of shallow groundwater sources in peri-urban (slum) areas. Dr. Kulabako is a corporate member of the Uganda Institute of Professional Engineers (UIPE). She has peer-reviewed for the Australian Journal of Soil Research, Singapore Journal of Tropical Geography, Water Resources Management, International Journal of Environmental Health Research, Journal of Water, Sanitation and Hygiene for Development and Journal of Contaminant Hydrology.

EXPERIENCE

GMILab has experience in geotechnical and material investigations for the following scope of works:

Small hydroelectric power dams and related facilities

Earth dams and related facilities

Water and wastewater treatment facilities

Buildings (residential and commercial)

Highways/roads and related activities

Oil and gas facilities  

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