A FIGHT AGAINST TRAFFIC Congested roadways are common problems that all drivers have to deal with. Whether commuting to work or enjoying a leisurely drive through the city, it is a problem that causes a great deal of stress and unnecessary frustration. However, while it is still a large problem, many engineers are dedicating their … Read more
Bitumen Content Test of a Bituminous Mix Purpose The test determines the bitumen content in the bituminous mix by cold solvent extraction. Apparatus & Solvent Centrifuge apparatus Trichloroethylene Procedure Take a representative sample of about 500 g, weigh it exactly and place it in the bowl of the extraction apparatus (W1). Cover the sample with … Read more
Test for Bitumen Emulsion: Viscosity by Saybolt Furol Viscometer Purpose Viscosity indicates the resistance to flow due to its internal friction. Higher the viscosity, lower the rate of flow. The test is conducted to see if it is in the specified range. The Test result is expressed in seconds for the flow of 60 cc … Read more
Measurement of Density of Soil in place by Nuclear Density Gauge Purpose This is a quick method of determining the in-situ density of soil which is based on the radiation. Equipment For this test special equipment which measures in place density using gamma radiation is used. Gauge usually contains a small gamma source (about 10 … Read more
Water Content Test of Soil by Alcohol Method Purpose It is a rapid method of determining the moisture content. Though less accurate, it is more suitable as a field test. The method shall not be used if the soil contains a large proportion of clay, gypsum, calcareous matter or organic matter. Apparatus Evaporating Dish– 10 … Read more
Moisture Content Determination Using Rapid Moisture Meter Purpose The purpose of this test is to determine the moisture content of soil quickly, without having to wait for the moisture to evaporate. Soil Specimen This test requires about 6 g of soil sample. Sand requires no special preparation. Coarse powders may be ground and pulverized. Cohesive … Read more
Importance and Need of Non-Destructive Testing It is often necessary to test concrete structures after the concrete has hardened to determine whether the structure is suitable for its designed use. Ideally such testing should be done without damaging the concrete. The tests available for testing concrete range from the completely non-destructive, where there is no … Read more
Pile Classification Based On Construction Method On the basis of method of installation pile foundations can be divided into the following 6 types. Precast Driven Piles Driven Cast-in-situ Piles Bored Cast-in-situ Piles Bored Precast Piles Driven Steel Piles Driven Timber Piles 1. Precast Driven Piles These are usually of RCC or pre-stressed concrete and generally … Read more
Harmful Effects of Dampness Dampness is the presence of hygroscopic or gravitational moisture. Dampness gives rise to unhygienic conditions apart from reduction in strength of structural components of the building. Dampness causes the following harmful effects. Dampness is responsible for breeding of mosquitoes and creates unhealthy living conditions. Due to dampness, moisture travel through walls … Read more
Precast Concrete Piles – Advantages & Disadvantages Precast concrete piles are cast, cured and stored in a yard before they are installed in the field mostly by driving. Advantages of Precast Concrete Piles Reinforcement used in the pile is not liable to change its place or get disturbed The defects in pile can be easily … Read more