Effect of aqueous sodium silicate on properties of recycled aggregate mortar

被引：25

作者：

Ali, Babar ^{[1
]}

机构：

[1] Univ Engn & Technol, Dept Civil Engn, Taxila 47050, Pakistan

来源：

SN APPLIED SCIENCES | 2019年 / 1卷 / 10期

关键词：

Recycled concrete aggregate (RCA); Sodium silicate (Na2SiO3); Compressive strength; Sorptivity coefficient; Chloride penetration; Acid attack on mortar; FLY-ASH; HIGH-VOLUME; ECONOMIC VIABILITY; CONCRETE; CONSTRUCTION; DURABILITY; STRENGTH; PERFORMANCE;

D O I：

10.1007/s42452-019-1342-2

中图分类号：

O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];

学科分类号：

07 ; 0710 ; 09 ;

摘要：

This study investigates the influence of sodium silicate (Na2SiO3) (NS) on the strength and durability performance of recycled concrete aggregate bearing mortar (RAM). NS is used as 0%, 1%, 2%, 3%, 4%, and 5% by weight of cement in RAM. Natural aggregate mortar (NAM) serving as control mix is also produced using natural sand. Compressive strength, sorptivity coefficient, apparent porosity, chloride penetration, and mass loss due to H2SO4 are investigated at various ages. Experimental results indicate that RAM shows inferior strength and durability properties compared to NAM. RAM with 2-3% NS shows 4-9% higher compressive strength than NAM. 2-3% NS also improves the durability of RAM by significantly reducing water sorptivity and permeable porosity compared to corresponding blank mix. RAM shows significant mass loss due to H(2)SO(4 )attack compared to NAM, whereas, RAM with 2-4% NS shows acid attack resistance comparable to that of the NAM. Based on experimental results, it can be established that RAM with 2-3% NS can outperform NAM by noticeable margin in strength-durability-economic performance.

引用

页数：12

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