Search results
Results from the WOW.Com Content Network
(A) Cement; 1. Specification for 33,43,53 Grade ordinary Portland cement IS 269 - 2015 2. Specification for Rapid hardening Portland cement IS 8041 - 1990 3. Specification for Portland Pozzolona cement IS 1489 (part 1&2) 1991 4. Methods of physical test for hydraulic cement IS 4031 - 1988 5. Method of chemical analysis of hydraulic cement IS ...
In particular, air permeability is almost universally used in the cement industry as a gauge of product fineness which is directly related to such properties as speed of setting and rate of strength development. Other fields where air permeability has been used to determine specific surface area include: Paint and pigments; Pharmaceuticals
Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout. It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin , and is usually made from limestone .
Test methods for the water-cement ratio and fineness modulus). 1919 – Effect of Curing Condition on Wear and Strength of Concrete (Describing 120 tests on cylinder-shaped samples and 300 tests on cubic samples in various moisture conditions and testing periods varying from 3 days to 4 months).
Cement and concrete [ edit ] The rate of curing of concrete depends on the fineness of the cement and of the components used in its manufacture, which may include fly ash , silica fume and other materials, in addition to the calcinated limestone which causes it to harden.
GGBS cement also produces a smoother, more defect-free surface, due to the fineness of the GGBS particles. Dirt does not adhere to GGBS concrete as easily as concrete made with Portland cement, reducing maintenance costs. GGBS cement prevents the occurrence of efflorescence, the staining of concrete surfaces by calcium carbonate deposits.
Concrete has a very low coefficient of thermal expansion, and as it matures concrete shrinks. All concrete structures will crack to some extent, due to shrinkage and tension. Concrete which is subjected to long-duration forces is prone to creep. The density of concrete varies, but is around 2,400 kilograms per cubic metre (150 lb/cu ft). [1]
Cement powder in a bag, ready to be mixed with aggregates and water. [1] Cement block construction examples from the Multiplex Manufacturing Company of Toledo, Ohio, in 1905. A cement is a binder, a chemical substance used for construction that sets, hardens, and adheres to other materials to bind them together.