Topic
Cement
About: Cement is a research topic. Over the lifetime, 68440 publications have been published within this topic receiving 829356 citations.
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TL;DR: In this paper, the effects of graphene oxide (GO), silica fume (SF) and graphene oxide encapsulated Silica Fume (GOSF) on the rheological properties of cement pastes were investigated.
208 citations
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TL;DR: Ozone treatment of isotropic pitch-based carbon fiber was found to increase the surface oxygen concentration and change surface oxygen from C −O to CO, thereby causing the contact angle between fiber and water to be decreased to zero as mentioned in this paper.
208 citations
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TL;DR: In this article, the overall hydration reaction kinetics of a 0.5 water/cement ratio portland cement mortar at ages up to 91 days were discussed. And the apparent activation energy was found to be 11.2 kcal/mol for degrees of hydration between 20 and 30%.
208 citations
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01 Jan 2003
TL;DR: In terms of the length of time it has been produced, the volume produced and the breadth of applications, calcium aluminate cements are by far the most important class of non-Portland cements.
Abstract: In terms of the length of time it has been produced, the volume produced and the breadth of applications, calcium aluminate cements are by far the most important class of non-Portland cements. Calcium aluminate cements are a relatively large family with a range of compositions which varies much more widely than Portland cement. Today the two major markets for calcium aluminate cement are in castable refractories and in dry mix mortars for special construction applications, which together account for around 80% of consumption. The use in technical concretes, for example, sewer linings, rapid repair, etc. is rather small. Calcium aluminate cements are known for their rapid strength gain, especially at low temperatures, superior durability across several categories and high temperature resistance. Their ability to consume water rapidly during hydration makes them a preferred component in building chemistry applications as this contributes to construction expediency. CACs are highly versatile materials that can be used as the full binding material, or as is more common, a component of a blended system where the contribution is based on the final desired properties.
208 citations
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TL;DR: In this article, the effects of graphene oxide (GO) on the early-age hydration process and mechanical properties of Portland cement paste were experimentally investigated in a study based on an isothermal calorimeter measurement, the hydration rate of cement was observed to increase with the increase of GO content by nucleation effect.
208 citations