Durability of steel reinforced concrete in chloride environments: An overview

In this experimental study, the reinforcing effects of graphene oxide (GO) on portland cement paste are investigated. It is discovered that the introduction of 0.03% by weight GO sheets into the cement paste can increase the compressive strength and tensile strength of the cement composite by more than 40% due to the reduction of the pore structure of the cement paste. Moreover, the inclusion of the GO sheets enhances the degree of hydration of the cement paste. However, the workability of the GO-cement composite becomes somewhat reduced. The overall results indicate that GO could be a promising nanofillers for reinforcing the engineering properties of portland cement paste.

Reinforcing effects of graphene oxide on portland cement paste

Combined effect of metakaolin and sea water on performance and microstructures of concrete

Screening of bacteria and concrete compatible protection materials

Chloride and chemical resistance of self compacting concrete containing rice husk ash and metakaolin

Two metakaolins, with similar mineralogical composition but which vary in their surface area (11.1 versus 25.4 m2 ∕g ), were evaluated for use as supplementary cementitious materials through measurements of workability, setting time, strength, elastic modulus, heat evolution, calcium hydroxide (CH) content, and surface area. Compressive and flexural strength of concrete were greater and increased at a faster rate when the finer metakaolin was used, as expected. The addition of metakaolin increased early age (i.e., 1–3 days ) flexural strength by as much as 60%. The effect of metakaolin surface area on compressive strength was particularly evident at the lower water-to-cementitious materials ratios (w/cms) examined and generally at later ages (i.e., 7 days or later). However, although greater in the metakaolin–cement concretes than the ordinary concretes (particularly at the lowest w/cm examined, 0.40) elastic modulus measured at 28 days , was not affected by the metakaolin surface area. The greater surfac...

Influence of metakaolin surface area on properties of cement-based materials

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Influence of metakaolin surface area on properties of cement-based materials