Abstract
This paper deals with a comparatively study of the engineering properties of the Oil-palm-boiler clinker (OPBC) OPBC and lightweight expanded clay aggregate (LECA) concretes. A grade 70 normal-weight concrete was designed as control mix. Normal weight coarse aggregate was substituted with OPBC and LECA up to 100% by volume, respectively. Their properties — workability, density, compressive strength, splitting tensile strength, flexural strength, modulus of elasticity, and water absorption — were studied. Results showed that at the same mix proportion, all mixes exhibited acceptable workability, except for concrete containing LECA up to 75% onwards, which required the reduction of superplastisizer dozen to 16%. Mixes with 75% onwards LECA content exhibited acceptable workability. The oven dry density of concrete containing 100% OPBC and 50% LECA onwards, respectively, in this study can be considered as lightweight concrete. The use of saturated OPBC and LECA in concrete improves the mechanical properties of concrete under air drying condition. The ceiling strength of LECA concrete is at the early age of 7 days, whereas it happens to normal weight concrete and OPBC concrete at a later age. The water absorption of all mixes is below 3%, which can be considered as good concrete.
Highlights
The building industry is currently facing a critical issue, that is, significant reduction of raw materials that are primarily used in the production of concrete to cater to the needs of the industry (Mefteh et al 2013)
The oven ‘dry density of concrete containing 100% Oil-palm-boiler clinker (OPBC) and 50% lightweight expanded clay aggregate (LECA) onwards in this study can be considered as lightweight concrete
A comparatively study has been proposed in this paper for the engineering properties of the Oilpalm-boiler clinker (OPBC) OPBC and lightweight expanded clay aggregate (LECA) concretes
Summary
The building industry is currently facing a critical issue, that is, significant reduction of raw materials that are primarily used in the production of concrete (e.g., crushed rock, gravel, sand, and water) to cater to the needs of the industry (Mefteh et al 2013). The substitution of coarse and fine aggregates with LECA produces lightweight concrete with 28-day compressive strength of 59 MPa and slump values ranging from 50 mm to 245 mm with the addition of superplasticizer (Bogas and Gomes 2013). These data confirm the success and proper workability of the concrete mix. High-strength normal weight concrete was substituted with coarse aggregate with OPBC and LECA in different percentages to evaluate various properties, such as workability, density, compressive strength with different curing regimes, splitting tensile strength, flexural strength, MOE, and water absorption This experiment used ordinary Portland cement (OPC) with a specific gravity of 3.14 and Blaine surface area of 0.351 cm2/g.
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