Influence of Nano Silica on Mechanical and Durability Characteristic of Mortar made by Partial Replacement of Natural Fi
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ORIGINAL PAPER
Influence of Nano Silica on Mechanical and Durability Characteristic of Mortar made by Partial Replacement of Natural Fine Aggregate with Recycled Fine Aggregate Anjana Sahu 1
&
Tanish Dey 1 & Sukanta Chakraborty 1
Received: 5 June 2020 / Accepted: 3 September 2020 # Springer Nature B.V. 2020
Abstract To implement sustainability concepts in the construction industry, the possibility of utilizing the recycled fine aggregate obtained from the crushing of coarse aggregate debris of concrete was explored in this paper. As there are no specific codes for mortar made by utilizing this recycled fine aggregate (RFA), experimentation was carried out to find out its mechanical and durability properties by partially replacing natural fine aggregate (NFA) with recycled fine aggregate in the percentages of 0, 10, 30, 50 and 70 by weight along with an admixture Nano Silica in liquid form by partial replacement of cement with the percentages of 0, 0.75, 1.50 and 3.00 by weight for each percentage replacement with RFA. The study indicates that, for all percentages of partial replacement with RFA, there is an enhancement in the mechanical and durability properties of the mortar with the increase in replacement of cement with Nano Silica. Keywords Natural fine aggregate (NFA) . Recycled fine aggregate (RFA) . Nano silica (NS) . Mortar . Mechanical . And durability characteristics
1 Introduction Cement Concrete and cement mortar are the most widely used materials in the construction industry, and their behavior depends on their constituents, such as cement and aggregates. The stronger and durable concrete or mortar may be achieved by the addition of admixtures in them. Due to rapid civilization, and modern trends in the planning and design approach have to lead the removal of aged structures, this necessitates their debris disposal problems. One of the best ways in reducing the debris disposal problem is by using them in recycle form, partially in the manufacture of concrete and mortar. This will not only reduce the land requirement for debris disposal but also reduce
* Anjana Sahu [email protected] Tanish Dey [email protected] Sukanta Chakraborty [email protected] 1
Department of Civil Engineering, Indian Institute of Technology (Indian School of Mines), Dhanbad, Jharkhand 826004, India
environmental pollution. However, the usage of recycled fine aggregate has not been specified in most of the standards. This may be due to limited research work done in the field of utilization of recycled fine aggregate in concrete and mortar. Therefore the incorporation of recycled fine aggregate in mortar production implies a new alternative for reuse of demolished waste products in the building and construction sector. Various researchers have studied the feasibility of using a fine fraction of recycled aggregate in mortar production. Lee et al. [21] have investigated the resistance of mortar prepared with 50% and 100% replacement of NFA with RFA when exposed to magnesium and sodium sulphate solution in water at diffe
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