THE GEOPRACTICA GROUP Geopractica is a South African based specialist geotechnical company formed in 1977 and is privately owned. The company operates from its own offices and laboratories in Florida, Gauteng province, with branch offices and yards located at Diepsloot in the Gauteng province, Durban in the KZN province.
Jun 16, 2016· Compressive strength of a cured standard mortar cube is calculated by measuring the maximum load applied to the cube to break it (in Newtons) and dividing that value by the crosssectional area of the cube (in mm^2), calculated from the mean dimen...
Authority of New York and New Jersey and Colin Lobo, NRMCA for providing the photos of the microwave water content test; John Gajda, CTLGroup, for providing the photos of thermal cracking in mass concrete; and ACI for the use of their material and documents referenced throughout the book. The authors have tried to make this Guide Specification for
One of the durability test of concrete is to determine permeability of water through specimen. Permeability apparatus is used for determining the permeability of cement mortar and concrete specimens of 15cm cubes cast in the laboratory. This model consista of three individual cells with stand.
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The company carries out all aspects of laboratory testing of soils, gravels, aggregates, asphalt, concrete, bitumen and water through both mobile and laboratory testing. The company has testing facilities in all regions of South Africa with its head office based in Germiston, Gauteng.
The cylinder specimen of concrete (150 diameter and 300 height) is a standard specimen to test the compressive strength in United States. While in Britain and Europe, the standard specimen for testing the compressive strength is a cube specimen of concrete by size 150 × .
Making of Concrete Test Cubes BS1881:Part 108:1983 Concrete Cube Strength BS1881:Part 116:1983 Tests on Asphalt and Bituminous Materials Preconditioning of Bitumen Samples Prior to Mixing or Testing NPRA 014 test Density of Bituminous Binders ASTM D7097 Flash and Fire Point by Cleveland Open Cup ASTM D9290
Designed for testing of cement, concrete moulds of various size 15x30 cm cubes, cubes, 15x15 cm cylindrical mould, bricks can also be tested with the help of adjustable hand wheel
Sep 16, 2014· 4. Filling the cone. Fill the cone with concrete to 3 equal heights in turn, After pouring the first layer, it must be rodded 25 times with 16mm diameter rounded steel. Fill the cone again for the second layer and do rodding as first layer. Fill the cone again for the last layer,...
Procedure of Concrete Slump test: The mold for the slump test is a frustum of a cone, 300 mm (12 in) of height. The base is 200 mm (8in) in diameter and it has a smaller opening at the top of 100 mm (4 in). The base is placed on a smooth surface and the container is filled with concrete in three layers, whose workability is to be tested .
The chapter on highperformance concrete says that the best cements to use for (highperformance concrete) "for South African conditions," are CEM1 42,5R, 52,5N, 52,5R. From a table in another chapter, I see that the early compressive strength (MPa) of 42,5N at .
Precast concrete joint problems include ends of pipe and structures that are not normal to the walls and centerline of the pipe within the limits of variation given in the appropriate AASHTO or ASTM specifications, and damaged or cracked ends where such damage would prevent making a .
The Scope of service being offered by Matrolab Group (Pty) Ltd includes the following: Testing of soils, concrete, aggregates, asphalt and bituminous products. In situ testing (relative compactions, DCP tests, plate bearing tests, seismic surveys etc.) Geotechnical investigations
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