Search results
Results From The WOW.Com Content Network
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 ...
Calcium silicate hydrate (also shown as C-S-H) is a result of the reaction between the silicate phases of Portland cement and water. This reaction typically is expressed as: 2 Ca 3 SiO 5 + 7 H 2 O → 3 CaO · 2 SiO 2 · 4 H 2 O + 3 Ca(OH) 2 + 173.6 kJ. also written in cement chemist notation, (CCN) as: 2 C 3 S + 7 H → C 3 S 2 H 4 + 3 CH + heat
Sulfur concrete has a low porosity and is a poorly permeable material. Its low hydraulic conductivity slows down water ingress in its low porosity matrix and so decreases the transport of harmful chemical species, such as chloride (pitting corrosion), towards the steel reinforcements (physical protection of steel as long as no microcracks develop in the sulfur concrete matrix).
As of March 2018, Uganda cement manufacturers had installed capacity of 6,800,000 tonnes of cement annually, [8] with Tororo Cement Limited being responsible for 3.0 million tonnes (44 percent) and Hima Cement Limited producing 1.9 million tonnes (28 percent). [2] Simba Cement Uganda Limited* produces 1 million tonnes annually (15 percent).
Autoclaved aerated concrete (AAC) is a lightweight, precast, cellular concrete building material. It is eco-friendly, and suitable for producing concrete-like blocks . [ 1 ] It is composed of quartz sand , gypsum , lime , portland cement , water, and aluminium powder .
DG Cement was established in 1986 by state-owned company, State Cement Corporation of Pakistan in Dera Ghazi Khan. [5] The plant was supplied by Ube Industries of Japan. [5] In 1992, DG Cement was acquired for PKR 1,799 million ($73.5 million) by Saigol Group under the privatization scheme of the Government of Pakistan.
The Concrete Elephant is a sculpture and local landmark standing along the A30 in Camberley on approach to The Meadows roundabout.. It was created by Barbara Jones for Trollope & Colls for the Lord Mayor's Show held on the 19 November 1963, carried on a yellow low loader with a pink and grey cab behind a person dressed as a zebra carrying a zebra crossing pole and light and a red post office ...
Portland cement is usually made from cheap, quarried raw materials, and these usually contain substantial amounts of Cr, Mn and Fe. For example, limestones used in cement manufacture usually contain 0.3-1% Fe 2 O 3, whereas levels below 0.1% are sought in limestones for white manufacture. Typical clays used in gray cement rawmix may contain 5 ...