Long term mechanical properties of self-compacting concrete made with slag cement and supplementary cementitious materials

Abstract

self-compacting concrete (scc) is becoming more popular in terms of application and innovation in the building industry. Durable concrete structures can be established when scc is used with the proper mix design and selection of materials. the amount and type of filler or supplementary cementitious materilas (scms) are among the most important parameters affecting the fresh and hardened properties of scc. mainly, scms improve the hydration of cement due to their physical characteristics and chemical compositions, thus a more sustainable and eco-friendly scc product could be achieved by the substitution of cement clinker by scms. the aim of this study was to evaluate the effect of total powder content, cement content and scms type on the fresh and hardened properties of scc. the compressive strength, splitting tensile strength, modulus of elasticity and total porosity properties were the experimental tests carried out in this investigation. the finding of this study showed that the compressive strength of scc with metakaolin (mk) gives higher values, as compared to mixtures with silica fume (sF), at the age of 400 days. mk and sF showed a negligible effect on the splitting tensile strength and modulus of elasticity, as compared to the reference mixtures. total porosity test results were lower with the increase of total powder content and by the addition of scms. keywords: self-compacting concrete, mechanical properties, sustainability, metakaolin, silica fume

Characteristics of cement pastes incorporating different amounts of waste cellular concrete powder

“…As a continue for the previous study, another attempt has been investigated to introduce the application of very fine WCCP as a supplementary material, aiming to increase the durability of normal strength concrete [9]. The main finding of this study is that a given amount of WCCP could increase the strength and durability of concrete however, too much of amount of WCCP could cause detrimental effects, especially in compressive strength.…”

“…Last decades witnessing discovering a big number of materials that prove its efficiency to use as supplementary materials for cement, where mainly used to improve the hydration of cement due to their physical characteristics and chemical compositions [8], but some of them full waste materials and also have the ability to improve various properties of concrete, which make them a suitable alternative of the traditional SCM [1,9]. One of these waste materials is waste cellular concrete powder (WCCP) which exists as one of the modern alternatives of these materials.…”