The volume increase of fine aggregate due to presence of moisture content is known as bulking. Fine sand bulks more as compared to coarse sand. Extremely fine sand particularly the manufactured fine aggregate bulks as much as about 40%. Note: Fine aggregate do not show any bulking when it is absolutely dry or completely saturated. … Read more
On Site Identification of Silt & Clay The distinction between silt & clay cannot be based on particle size because the significant physical properties of the two materials are related only indirectly to the size of particles. Furthermore, since both are microscopic, physical properties other than particle size must be used as criteria for field … Read more
Soil in an engineering sense is a relatively loose agglomerate of mineral and organic materials and sediments found above bedrock. Texturally the soil is divided into two primary groups. Coarse grained soil Fine grained soil The behavior of coarse grained soil is different from fine grained soil. The method of describing coarse grained soil is … Read more
Guidelines on Storing of Cement on Site In large work or in major construction works, cement is generally stored at site. The cement must be stored in such a manner so that, it can be easily accessible for proper inspection. The building in which cement is stored should be water tight in order to prevent … Read more
Objective For determination of free swell index of soils Reference Standard IS: 2720(Part 40)-1985- Methods of test for soils: Determination of free swell index of soil. Equipment / Apparatus Oven(1050C to 1100C, min) Balance (0.01g accuracy) Sieve [425 micron] Graduated glass cylinder [100ml capacity] Preparation sample The soil passing 425 micron sieve is used in … Read more
Objective For determination of linear shrinkage of soil Reference Standard IS: 2720(Part 20)-1966- Methods of test for soils: Determination of linear shrinkage. Equipment / Apparatus Mould Oven Preparation sample A sample weighing 150g from thoroughly mixed portion of bulk material passing 425 micron IS sieve is prepared. Procedure The mould is thoroughly cleaned and a … Read more
Objective Determination of CBR of soil either in undisturbed or Remoulded condition Reference Standards IS: 2720(Part 16)-1973- Methods of test for soils: Laboratory determination of CBR. Equipments / Apparatus Compression machine Proving ring, Dial gauge, Timer Sampling tube Split mould Vernier caliper, Balance Preparation sample The test may be performed (a) On undisturbed soil specimen … Read more
Objective Determination of shear strength parameters of a silty or sandy soil at known density and moisture content. Reference Standards IS: 2720(Part 13)-1986- Methods of test for soils: Direct shear test. Equipment / Apparatus Shear box Box container Porous stone and grid plate Tamper, Balance , Sieve(4.75 mm) Loading frame, Proving ring, Dial gauge. Preparation … Read more
Objective For determination of the relation between the water content and the dry density of soils using light compaction. Reference Standard IS: 2720(Part 7)-1980- Methods of test for soils: Determination of water content-dry density relation using light compaction. Equipments & Apparatus Cylindrical mould & accessories [volume = 1000cm3] Rammer [2.6 kg] Balance [1g accuracy] Sieves … Read more
Objective For determination of the shrinkage limit of soil. Reference Standards IS : 2720(Part 6)-1972 Methods of test for soils : Determination of shrinkage factor. Equipment & Apparatus Oven Balance Sieve Mercury Desiccator Preparation sample The soil passing 425 micron sieve is used in this test. Procedure 100 gm. of soil sample from a thoroughly … Read more