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Displaying items by tag: silica

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Sublime Systems secures ASTM C1157 designation for Sublime Cement reduced-CO2 cement

18 September 2023

US: Sublime Systems’ Sublime Cement reduced-CO2 cement has received an ASTM C1157 designation. InterestingEngineering News has reported that this enables builders to use it in various projects in line with international building codes. Sublime Systems’ cement consists of lime and silica produced by electrolysis using non-carbonate calcium compounds.

CEO Leah Ellis said "Our aim is to make a profound and lasting impact on global CO2 emissions. The ASTM C1157 designation is a validation of our efforts to integrate low-carbon innovation into quality construction materials."

Published in Global Cement News
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Solidia Technologies patents new synthetic pozzolan

11 September 2023

US: Texas-based Solidia Technologies has patented a synthetic pozzolan that may be used as a supplementary cementitious material (SCM) in cement production. The product is based on previously low-value materials, including minimally processed oil shales and clay minerals. Solidia Technologies produces the material by various methods, including firing the materials to yield a mix of crystalline components and activatable amorphous phase material. Alternatively, production may also involve the aqueous decomposition of manmade silicates in the presence of CO2.

Published in Global Cement News
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Imperial College London team secures government funding for carbon negative cement development

20 July 2023

UK: A team at Imperial College London has won a US$1.27m grant for its research into developing carbon negative cement from silica. The research won the Department for Energy Security and Net Zero (DESNZ)’s Carbon Capture, Usage & Storage (CCUS) Innovation 2.0 competition. The Imperial team sources its silica from natural olivine. It says that the compound behaves in the same way as other supplementary cementitious materials. Meanwhile, magnesia from the decomposition of the olivine can serve as a carbon sink in the form of magnesium carbonate. It, in turn, could serve as a raw material for concrete block production.

The DESNZ’s Net Zero Innovation Portfolio, of which the CCUS Innovation 2.0 competition is a part, has a budget of US$1.29bn.

Published in Global Cement News
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Hazemag supplies pozzolan crushers to Northern Cement

18 September 2020

Philippines: Germany-based Hazemag says that it has supplied two HRC 1230 roller crushers to Northern Cement’s 2.0Mt/yr Bulacan, Quezon cement plant. The supplier says that each crusher has a capacity of 800t/hr and will grind pozzolan, shale and silica in the plant’s additive crushing and handling line.

Published in Global Cement News
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