Ternary and quaternary blends as partial replacement of cement to produce hollow sandcrete blocks

Sojobi, AO, Awolusi, TF, Aina, GB, Oke, OL, Oladokun, MO ORCID: https://orcid.org/0000-0001-5320-5219 and Oguntayo, DO 2021, 'Ternary and quaternary blends as partial replacement of cement to produce hollow sandcrete blocks' , Heliyon, 7 (6) , e07227.

[img]
Preview
PDF - Published Version
Available under License Creative Commons Attribution Non-commercial No Derivatives 4.0.

Download (2MB) | Preview

Abstract

Hollow sandcrete blocks constitute more than 90% of residential building construction in developing countries especially in West Africa. Over-reliance on dredged river sands and conventional ordinary Portland cement (OPC) contributes to environmental degradation and post-construction problems such as swelling and shrinkage-induced cracks prevalent in construction projects. The study investigates potential utilization of locally available materials such as laterite, calcite and calcined clay as ternary and quaternary blends to replace cement and quarry dust as 100% replacement of river sand with the aid of Taguchi-Response surface methodology approach. Optimum ternary blend of 24% calcined clay +1% calcite +75% OPC is recommended to achieve volume stability, higher compressive strength and higher flexural load capacity. Alternatively, ternary blends of 24% calcite +4% calcined clay +72% OPC can also be utilized. The improved mechanical properties were attributed to the Na- and Ca-rich aluminosilicates provided by the blended cements. Successful utilization of ternary and quaternary blended cements to produce stronger, durable and eco-friendly sandcrete blocks depends on utilization of high binder-to-aggregate ratio, optimal combination of the constituents, appropriate water-cement ratio and curing/production method. Partial and 100% replacement of river sand with granite dust is possible and contributes to reduction of environmental problems caused by river dredging as well as cleaner, ecofriendly construction. Ternary and quaternary blended cements is recommended to avert post-construction problems such as swelling and shrinkage-induced cracks prevalent in construction projects.

Item Type: Article
Schools: Schools > School of the Built Environment
Journal or Publication Title: Heliyon
Publisher: Elsevier
ISSN: 2405-8440
Related URLs:
Depositing User: USIR Admin
Date Deposited: 02 Jul 2021 08:30
Last Modified: 28 Aug 2021 10:36
URI: http://usir.salford.ac.uk/id/eprint/61087

Actions (login required)

Edit record (repository staff only) Edit record (repository staff only)

Downloads

Downloads per month over past year