Improving the workability and strength of silica fume concrete by using silane-treated silica fume
نویسنده
چکیده
Mortar with high workability even without a water-reducing agent and with high tensile and compressive strengths (3.1 and 78 MPa, respectively) was obtained by using as an admixture silica fume that had been surface treated with a silane coupling agent. The treatment enhanced the wettability of silica fume by water, thereby increasing the workability of the mortar mix. It also enhanced the bond between silica fume and cement, thereby increasing the strength and modulus, both under tension and compression. In particular, the tensile strength was increased by 31% and the compressive strength was increased by 27%. Moreover, the flexural storage modulus, loss tangent, and density were increased. © 1999 Elsevier Science Ltd. All rights reserved.
منابع مشابه
Effect of Limestone Powder on Compressive Strength of Concrete Containing Silica Fume and Optimization of Mix Design Using Response Surface Method
Silica fume has been largely used in concrete in recent decades due to its effect on improvement of strength and durability of concrete. On the other hand, attention has been recently paid to the use of limestone powder as a substitute for part of cement in concrete, basically because of its low price and its positive effect on the durability of concrete. The aim of the current study is the i...
متن کاملEffect of Limestone Powder on Compressive Strength of Concrete Containing Silica Fume and Optimization of Mix Design Using Response Surface Method
Silica fume has been largely used in concrete in recent decades due to its effect on improvement of strength and 
durability of concrete. On the other hand, attention has been recently paid to the use of limestone powder as a substitute for part of cement in concrete, basically because of its low price and its positive effect on the durability of concrete. The aim of the current study is the...
متن کاملCarbon fiber reinforced cement improved by using silane-treated carbon fibers
The tensile strength of cement paste was increased by 56% and the modulus and ductility were increased by 39% by using silane-treated carbon fibers and silane-treated silica fume, relative to the values for cement paste with as-received carbon fibers and as-received silica fume. Silane treatment of fibers and silica fume contributed about equally to the strengthening. Silane treatment of fibers...
متن کاملInfluence of Nano-Silica and Silica Fume in the Steel Corrosion Embedded in Concrete
Corrosion of steel is one of the most important potential dangers and threats in concrete structures. Corrosion of steel embedded in reinforced concrete plays a key role in reducing the strength and durability of reinforced concrete. Several studies have proposed that alternative approaches to enhancing the performance of reinforced concrete and its resistance to corrosion. In this study, the r...
متن کاملValue of Admixture in Concrete Mix Design
Despite its few inherent shortcomings, concrete has proved to be the most widely used construction material, no substitute in time still to come. In the present investigation, study of admixture of concrete was carried out. The strength of concrete depends on its mix proportions. We used so many admixture e.g. ‘silica. Fumes, fly ash etc , when we used these type of admixture the result was ver...
متن کامل