Self-consolidating mortar incorporating higher volume blended pozzolans for concrete repair

M Jamil,N L Fong,E I Sahari,A B M A Kaish,L Nahar,M Olivia,D Wishart,I.D Ketut Sudarsana,G Wibisono,M Infantri Yekti,I.M Agus Ariawan,D Andrio,E Saputra,A Marto,G Pringgana,R Ridwan,K Yamamoto

doi:10.1051/matecconf/201927601016

Abstract

The challenge of repairing cracked or damaged concrete has been increasing worldwide. Several cement-based materials, such as ferrocement, fiber-reinforced cementitious mortar (FRCM), and textilereinforced mortar (TRM), have been developed and used to address the aforementioned challenge. Self-consolidating mortar is required to accelerate structural concrete repair using cementitious composites (e.g., ferrocement, FRCM, and TRM). In this study, a high-strength selfconsolidating mortar is developed using higher-volume (50% by weight of cement) blended pozzolans. Experimental results exhibit potential in terms of flowability and strength. Therefore, this type of cementitious selfconsolidating mortar can be used to expedite concrete repair or strengthening using cementitious composites.

Highlights

Concrete and reinforced concrete is the most commonly used construction materials at present
Despite the high compressive strength of concrete, it suffers from low tensile strength and brittleness that lead to cracking
Sourced ordinary Portland cement (OPC) with blended pozzolans was used as the binder material

Summary

Introduction

Concrete and reinforced concrete is the most commonly used construction materials at present. Despite the high compressive strength of concrete, it suffers from low tensile strength and brittleness that lead to cracking. The application of epoxy and cement slurry injection to repair cracked concrete has been reported in the literature [3]. Strengthening concrete structures using fiber-reinforced polymer has become a common practice worldwide [4,5,6]. Ferrocement has been reported as an effective and low-cost material for strengthening concrete structures [1, 2, 7,8,9,10,11]. Textile-reinforced mortar (TRM) and fiber-reinforced cementitious mortar (FRCM) are promising materials for strengthening concrete structures [12,13,14]

Methods

Results

Conclusion