Compressive Strength and Abrasion Resistance of Concretes under Varying Exposure Conditions

Adekunle P Adewuyi,Joseph O Akinyele,Ismaila A Sulaiman

doi:10.4236/ojce.2017.71005

Adekunle P Adewuyi, Joseph O Akinyele + Show 1 more

Open Access

https://doi.org/10.4236/ojce.2017.71005

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Abstract

The purpose of this study is to comparatively evaluate the wear resistance of concretes under abrasion rates. Five concrete mix proportions of a fixed water-cement ratio of 0.45 were considered in the study, but the constituent materials, age of concrete and exposure contact conditions were varied. The coarse aggregate type employed in the study was crushed granite. The compressive strength and abrasion resistance of concretes were tested between at ages 7 to 70 days and 100 - 500 revolutions of abrasion wheels respectively. The study revealed that the compressive strength and abrasion resistance had the optimal performance when the coarse aggregate content was 45% and the worst performance when the fine aggregate content was 28.7% of the total weight of concrete constituents. There was a remarkable loss of concrete particles to wear between 200 revs and 300 revs of abrasion wheel contact. Concrete grade in excess of 60 N/mm2 is required to resist abrasion beyond 200 revolutions of abrasion wheel contact on concrete specimens. Concretes investigated also showed weak resistance to deep abrasion at and above 300 revolutions of abrasion wheel contact.

Highlights

Abrasion is often a foremost operational threat to the quality and durability of existing concrete structures leading to deterioration and premature failure
The compressive strength of the concrete mixtures increased as the cement contents increased for all the test days
Even though M2 had the highest fine aggregate content and lowest coarse aggregate amongst the five mixtures, this uniqueness did not reflect in the compressive strength pattern

Summary

Introduction

Abrasion is often a foremost operational threat to the quality and durability of existing concrete structures leading to deterioration and premature failure. Sulphate and chloride penetration resistance, and less frequently, water absorption and air/oxygen permeability have received remarkable attention, abrasion resistance is one of the least investigated durability properties of hardened concrete. This is vital in hydraulic structures, floors and highway and runway pavements. ASTM C 779 [7] and ASTM C 944 [8] are applied to measure the abrasion resistance of pavements and floors

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Conclusion