Factors Affecting the Setting and Hardening of Portland cement (1) The Impact of Cement’s Composition The mineral composition of cement and their ratios are the main factors affecting the setting and hardening of cement. As mentioned above, various mineral components will reveal different characteristics when reacting with water. For example, the increase of C3A can … Read more
1. STORING OF BRICKS ON SITE Stacking and Storing of Bricks at Site Stack the bricks close to the site of work so that less effort is required to unload and transport the bricks again by loading on pallets or in barrows. Different types of bricks (such as clay bricks, clay fly ash bricks etc.) … Read more
What Is Volume Batching of Concrete? Batching of concrete means measuring different ingredients of concrete (i.e. cement, sand, coarse aggregate and water) before mixing it. When this measurement is done on the basis of volume, we call it Volume Batching. Below are mentioned some of important points to remember before adopting volume batching method in … Read more
Comparison between Ordinary & Performance Graded Binders The primary differences between ordinary graded binder and performance graded binder is given in the following table Ordinary Graded Binders Performance Graded Binders Binders are graded either based upon penetration or viscosity Binders are graded based upon pavement temperature, which are close to in service conditions of pavements … Read more
Shear Strength Test of Soil The choice of appropriate shear strength tests for a particular project depends on the soil type, whether the parameters will be used in a total or effective stress analysis, and the relative importance of the structure. Common laboratory tests include direct shear, triaxial, unconfined compression, and laboratory vane shear test. … Read more
Types of Limes Different types of limes are used for building construction. It is not generally found in the free state. Lime is a product which is obtained by burning lime stone, a raw material, found in lime stone hills or lime stone boulders in the beds of old river, kankar found below ground level, … Read more
Unit Weight/Dead Weight of Construction Materials The tables given below give the unit weight or dead weight of some common construction material that is used by designer while computing load related calculation. 1. Bituminous Substance Item Weight (kg/m3) Anthracite coal 1550 Peat (dry) 560 to 640 Charcoal (light) 300 Coke 1000 Graphite 500 Crude oil … Read more
Flow Table Test for Cement Mortar The flow table test of cement mortar is done only to calculate the amount of water required for gauging for conducting strength test of masonry cement and for drying shrinkage test of cement. It also gives us some idea on the workability of cement mortar. The amount of water … Read more
Different Forms of Bitumen 1. Cutback Bitumen Normal practice is to heat bitumen to reduce its viscosity. In some situations preference is given to use liquid binders such as cutback bitumen. In cutback bitumen suitable solvent is used to lower the viscosity of the bitumen. From the environmental point of view also cutback bitumen is … Read more
Types of Soil Shear Test Based on Drainage Condition The shear strength parameters in the case of saturated soils depend very much upon the drainage conditions and therefore in the laboratory shear test, the drainage condition expected in the field for a particular problem should be simulated. Based on drainage condition the shear tests are … Read more
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