Topic
Mortar
About: Mortar is a research topic. Over the lifetime, 25024 publications have been published within this topic receiving 218739 citations.
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TL;DR: In this paper, the authors introduced a new rapid, relevant and reliable (R 3 ) test to predict the pozzolanic activity of calcined clays with kaolinite contents ranging from 0 to 95%.
296 citations
TL;DR: The effects of nano-SiO(2) on three ash particle sizes in mortar were studied by replacing a portion of the cement with incinerated sewage sludge ash and results indicate that the amount of water needed at standard consistency increased and a reduction in setting time became noticeable for smaller ash particles.
296 citations
TL;DR: In this paper, the effect of RCA to concrete and a treatment method utilized to improve the properties of the RCA by reducing the amount of the adhered mortar, and therefore improving the mechanical properties and durability of RAC.
294 citations
TL;DR: In this article, the carbonation of fly ash concrete is studied by using two types of Fly Ash with different CaO contents, and it is observed that under natural exposure environments, the Carbonation rate is the highest when specimens are exposed in the city.
292 citations
TL;DR: In this article, the authors evaluated the effectiveness of various mineral additives and chemical admixtures in producing self-compacting concrete (SCM) and concluded that fly ash and limestone powder significantly increased the workability of SCM.
Abstract: Mortar serves as the basis for the workability properties of self-compacting concrete (SCC) and these properties could be assessed by self-compacting mortars (SCM). In fact, assessing the properties of SCM is an integral part of SCC design. The objective of this study was to evaluate the effectiveness of various mineral additives and chemical admixtures in producing SCMs. For this purpose, four mineral additives (fly ash, brick powder, limestone powder, and kaolinite), three superplasticizers (SP), and two viscosity modifying admixtures (VMA) were used. Within the scope of the experimental program, 43 mixtures of SCM were prepared keeping the amount of mixing water and total powder content (portland cement and mineral additives) constant. Workability of the fresh mortar was determined using mini V-funnel and mini slump flow tests. The setting time of the mortars, were also determined. The hardened properties that were determined included ultrasonic pulse velocity and strength determined at 28 and 56 days. It was concluded that among the mineral additives used, fly ash and limestone powder significantly increased the workability of SCMs. On the other hand, especially fly ash significantly increased the setting time of the mortars, which can, however, be eliminated through the use of ternary mixtures, such as mixing fly ash with limestone powder. The two polycarboxyl based SPs yield approximately the same workability and the melamine formaldehyde based SP was not as effective as the other two.
292 citations