Effects of RHA on autogenous shrinkage of Portland cement pastes

Microstructure of cement pastes with residual rice husk ash of low amorphous silica content

“…The use of residual RHA and RHA produced by controlled burning has a positive effect on autogenous shrinkage, owing to their porous cellular structure. RHA probably acts as an internal reservoir, providing a local source of water to the paste volume [14]. Depending on the level of substitution in the cement, the finely divided residual RHA can inhibit or enhance the alkaliaggregate reaction in concrete [6].…”

Effect of internal curing with super absorbent polymers on the relative humidity of early-age concrete

“…3 [27]. Moreover, the water consumed by cement hydration is complemented by the water released from the SAPs [42]. Thus, the IRH of specimens with SAPs under sealed condition decreases because the IC water supplied by these polymers cannot counteract the loss of water to cement hydration.…”

“…3 [27]. Moreover, the water consumed by cement hydration is complemented by the water released from SAPs [42]. Therefore, the critical time of IRH increases with an increase in IC water content.…”

Investigation of More Environmental Friendly Materials for Passive Cooling Application Based on Geopolymer

“…Due to these problems, rice husk ash (RHA) is usually dumped en-masse into water streams, which precipitate pollution and contamination. However, this was all before it was determined that RHA makes a good constituent as a mineral admixture of concrete [10]. Among suitable silica-rich resource (pozzolanic material) are Rice husk-bark ash (RHBA) or rice husk ash (RHA), which are solid waste that are generated by biomass power plants that uses rice husk and eucalyptus bark as fuel.…”