How To Control Temperature Of Concrete Ingredients In Hot Weather?

During hot weather, problems that may occur in concrete include the following. Rapid slump loss Reduced air content Premature stiffening Plastic shrinkage cracks Thermal cracking Therefore it is necessary to keep concrete temperature down. The most effective way to keep concrete temperature down is by controlling the temperature of its ingredients. Among all ingredients of … Read more

What Are The Effects of Hot Weather On Concrete?

Effects of hot weather on concrete, in the absence of special precautions can be as follows. Accelerated setting of concrete Reduction in strength of concrete Increased tendency to crack Rapid evaporation of water during curing period Difficulty in control of air in air-entrained concrete Accelerated Setting The rate of setting time of the concrete increases … Read more

ADDITIVES USED FOR BRICK MANFACTURING

Structure Opening Materials

Why additives used? Additives are used to improve some properties of clay mass, such as Shaping characteristics Drying behavior Firing behavior More than that, some of the additives help in conservation of agricultural land and utilization of waste materials. And remember, additives must contain certain physical and chemical characteristics so that it does not adversely … Read more

How to Sample Bricks And Criteria for Acceptance of the Lot? (IS-5454)

Stacks of bricks at brick works

Bricks are extensively used as building material in most of the construction work. The quality of a structure or building is therefore dependent upon the quality of bricks used there in. We cannot test each and every brick to inspect its quality as it is impractical. That is why a sampling method or procedure must … Read more

SPECIFICATION FOR HEAVY DUTY BURNT CLAY BUILDING BRICKS (IS-2180-1988)

Heavy Duty Burnt Clay Bricks

General Quality Bricks shall be free from cracks and flaws and nodules of free lime. Bricks shall have smooth rectangular faces with sharp corners Bricks shall be of uniform in colour and texture. Bricks shall be manufactured either by extrusion or by pressing. Two bricks when struck together shall emit a clear metallic ring sound. … Read more

SPECIFICATION FOR BURNT CLAY PAVING BRICKS (IS-3583-1988)

Paving Bricks

General Quality Bricks shall be free from cracks and flaws and nodules of free lime. Bricks shall have smooth rectangular faces with sharp corners Bricks shall be of uniform in colour and texture. Bricks shall be mechanically shaped and not hand moulded. Bricks shall not be provided with frogs.  Dimensional Specification Length (L), mm Width … Read more