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CivilBlog.Org
- 7 FACTORS INFLUENCING REBOUND HAMMER TEST OF CONCRETE November 22, 2019Rebound Hammer Test The Schmidt rebound hammer is principally a surface hardness tester with little apparent theoretical relationship between the strength of concrete and the rebound number of the hammer. However, within limits, empirical correlations have been established between strength properties and the rebound number. Further, scientist has attempted to establish a correlation between the […]
- 6 FOCAL PROPERTIES OF CONCRETE IN FRESH AND HARDENED STATE February 21, 2019Properties of Hardened Concrete 1. Strength: Concrete is strong in compression but relatively weak in tension and bending. It takes a great deal of force to crush concrete, but very little force to pull it apart or cause bending cracks. Compressive strength is determined primarily by the amount of cement used, but is also […]
- HOW AGGREGATE PROPERTIES AFFECTS CONCRETE PROPERTIES? February 15, 2019INFLUENCE OF AGGREGATE PROPERTIES ON CONCRETE Aggregates influence the properties of concrete/mortar such as water requirement, cohesiveness and workability of the concrete in plastic stage, while they influence strength, density, durability, permeability, surface finish and colour in hardened stage. Aggregates are generally classified into two categories viz. natural and manufactured/processed. Geologically aggregates may be obtained […]
- AN INTRODUCTION TO CEMENT CONCRETE FOR BEGINNERS February 12, 2019CEMENT AND CONCRETE – ARE THEY THE SAME? Many people think that cement and concrete are the same product – they are not. Cement is a dry powdered chemical that, when mixed with water, slowly reacts to form a new hard, solid compound. On the other hand, concrete is a mixture of cement blended with […]
- 5 TYPES OF ERRORS IN CHAINING AND WAYS TO MITIGATE IT February 9, 2019Errors in Chain Surveying Every measurement made with a mechanical device is subject to any error that could possibly be caused by the condition of the device or by the procedure used in taking the measurement. Some of the more common sources of errors are the standards to which the chain was manufactured, any damage […]
- 3 MAJOR COMPONENTS OF QUALITY CONTROL OF READY MIX CONCRETE November 3, 2018QUALITY CONTROL OF READY MIX CONCRETE Quality control of ready-mixed concrete may be divided into three components, 1. Forward control, 2. Immediate control and 3. Retrospective control. FORWARD CONTROL: Forward control and consequent corrective action are essential aspects of quality control. Forward control includes the following. • Control of purchased material Quality • Control of […]
- HOW TO INCREASE REPETITION VALUE OF PLYWOOD? February 7, 2018TIPS ON INCREASING REPETITION VALUE TO PLYWOOD There are many reasons to use plywood as a concrete shuttering materials. Out of those reasons one reason is it’s reuse value. But if proper care has not been taken during handling of plywood then it will not give a higher repetition value. So in this video I […]
- EFFECT OF TREE ROOTS ON BUILDING January 30, 2018What Is The Effect of Tree Roots on Building? Fast growing trees close to buildings can cause unequal settlement when active tree roots dry out the soil causing differential soil shrinkage. Shrinking clays affect the bearing capacity and lead to movement in the building, especially in shallow foundations. Tree roots can extend over a considerable […]
- 6 DIFFERENT TYPES OF WEATHERING OF ROCK MASS January 24, 2018WEATHERING OF ROCK MASS ‘Weathering is the process of alteration and breakdown of rock and soil materials at and near the Earth’s surface by chemical decomposition and physical disintegration’ (Geological Society Engineering Group Working Party Report, 1995). Of particular note in this definition is that weathering is described as a process. It is not a […]
- HOW TO DETERMINE WEIGHT VOLUME RELATIONSHIP OF SOIL? [STEP BY STEP] January 19, 2018WEIGHT VOLUME RELATIONSHIP OF SOIL The physical properties of a soil give insight as to the identification of the soil and the determination of its characteristics and load response. These properties can be determined by performing a laboratory analysis on undisturbed soil samples obtained during the test boring process. The laboratory analysis should be performed […]