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Self-consolidating concrete or self-compacting concrete (SCC) [1] is a concrete mix which has a low yield stress, high deformability, good segregation resistance (prevents separation of particles in the mix), and moderate viscosity (necessary to ensure uniform suspension of solid particles during transportation, placement (without external compaction), and thereafter until the concrete sets).
It uses a simple Archimedes' screw to mix (clockwise) and to lift the concrete to the delivery chute. Ready-mix concrete (RMC) is concrete that is manufactured in a batch plant, according to each specific job requirement, then delivered to the job site "ready to use". [1] There are two types with the first being the barrel truck or in–transit ...
The Cement Company of Northern Nigeria was incorporated in 1962 as the first cement manufacturing firm in the Northern Nigeria region. The first plant was built by a West German engineering firm at the cost of three million pounds. [7] The capacity of the first plant was 200,000 tonnes per annum producing through a dry process kiln.
Nigerian property developer Olawale Ayilara is grappling with spiraling costs.He's CEO of LandWey Investment, which is building 12,000 homes across 14 sites in the affluent Lekki district of Lagos ...
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.
CLSM consists of a mixture of Portland cement, water, aggregate and sometimes fly ash.Unlike ordinary concrete, CLSM has much lower strength. The strength of CLSM is less than 1,200 pounds per square inch (8.3 MPa), while ordinary concrete has strengths exceeding 3,000 pounds per square inch (21 MPa) [citation needed].
The energy absorption capacity of foamed concrete was approximated from drop testing and found to vary from 4 to 15 MJ/m 3 depending on its density. With optimum absorption estimated from a 1000 kg/m 3 moderate density mix at water to cement (w/c) ratios from 0·6 to 0·7. [17]
In 2016, the firm's capacity was 14.1 million tonnes of cement, 5 million metric tonnes of aggregates and 3.5 million tonnes of ready-mix concrete. The company manufactures and distributes products through its associated divisions that include WAPCO, United Cement Company of Nigeria, Calabar , Ashaka Cement, Lafarge South Africa and Atlas ...