The Study of Flowability and The Compressive Strength of Grout/Mortar Proportions for Pre- placed Concrete Aggregate (PAC)

Nursiah Chairunnisa,Arie Febry Fardheny,A Wismadi,M Fauziah,J.A Fajri,A Nurmiyanto,P.A.P Agustiananda,B Kushari

doi:10.1051/matecconf/201928004010

Nursiah Chairunnisa, Arie Febry Fardheny + Show 6 more

Open Access

https://doi.org/10.1051/matecconf/201928004010

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Journal: MATEC Web of Conferences	Publication Date: Jan 1, 2019
Citations: 7	License type: CC BY 4.0

Affiliation: Lambung Mangkurat University

Abstract

This experimental study is focused on the performance of appropriate grout/mortar for pre-placed aggregate concrete (PAC) incorporating superplasticizer in the mortar mixture regarding the flowability and strength of grout or mortar. Twenty-one samples of specimens were prepared. The parameter tests consist of water-cement ratios, cement sand ratios and variation dosages of superplasticizer. To examine the flowability/fluidity of grout or mortar, the flow cone test was applied. The flow cone test result indicated that there were three proportional grout that can meet the requirement for fluidity according to ASTM C-939. The compressive strength of specimens was tested. It was concluded that the composition of grout with containing the percentage of 0.7% by weight of cement of superplasticizer as chemical admixtures at a water-cement ratio of 0.6 and a cement-sand ratio of 0.5 is the proper composition of grout for pre-placed aggregate concrete (PAC).

Highlights

Nowadays, concrete is a construction material that is overgrowing along the development of the construction industry
Pre-placed aggregate concrete (PAC) can be defined as a method of concreting process which consists of the two-stage process which the first process is the placement of coarse aggregates in the formwork and the second stage is fill in the voids with grout of mortar and usually using chemical admixtures for workability [1]
In Pre-placed Aggregate Concrete (PAC), coarse aggregate is not mixed with other materials in the concrete mixer, and it can diminish the consumption of energy in concrete mixing [1]

Summary

Introduction

Concrete is a construction material that is overgrowing along the development of the construction industry. Pre-placed aggregate concrete (PAC) can be defined as a method of concreting process which consists of the two-stage process which the first process is the placement of coarse aggregates in the formwork and the second stage is fill in the voids with grout of mortar and usually using chemical admixtures for workability [1]. This technology was first known in 1940 in the USA.

Mix design and mixing process

Result and Discussion

Conclusion