Strength development of plain concrete slabs by the sustainability potential of lead-loaded rice husk (LLRH)

Abbas Saeed,Abdulkareem Shahadha,Abbas Nsaif

doi:10.5937/jaes0-32253

Abbas Saeed, Abdulkareem Shahadha + Show 1 more

Open Access

https://doi.org/10.5937/jaes0-32253

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Abstract

The production of environmentally friendly, sustainable plain concrete slabs is an essential requirement in this work. It is interesting to note that the ions of lead of wastewater loaded into rice husks can be used as an additive for plain concrete slabs to improve the flexural strength, as well as the workability of plain concrete slabs (or walls), which are produced by using Lead-loaded rice husk material as an additive substance in protective shields for the establishment of hospital radiology rooms. The results show that flexural strength for plain concrete slabs begins with a relative increase until it reaches breakdown. The results at age of 28 days also show that by increasing the proportion of Lead-loaded rice husk added to plain concrete slabs, the flexural strength gradually increases until it reaches onethird of the value of reference plain concrete slabs at a specific ratio, then decreases sharply until the slabs fail. These results provide a novel approach to managing toxic waste and propose an easy, simple, effective, economical, and environmentally friendly way to get rid of more than one type of waste and reach the concept of zero residue level.

Highlights

Concrete remains the influential primary factor in construction development, despite the participation of steel or timber, which pushes researchers to not leave concrete without developing the physical and chemical properties within the twentieth century, which correlates with installing constructions in buildings, bridges, roads, dams, and even in nuclear reactor structures
The study looks at the properties by examination of a concrete slump test, concrete compressive strength for the cubic model, splitting tensile strength for cylindrical models and flexural strength for plain concrete slabs prepared in several concrete mixtures
The approach may count as an innovative study to strengthen concrete through the use of rice husks that absorb heavy metals from wastewater. This is a novel technique that is premiering in this study for the manufacture of an environmental concrete additive that uses agricultural remnant waste to absorb the metals from wastewater in a plain concrete slab to investigate the flexural strength

Summary

Introduction

Concrete remains the influential primary factor in construction development, despite the participation of steel or timber, which pushes researchers to not leave concrete without developing the physical and chemical properties within the twentieth century, which correlates with installing constructions in buildings, bridges, roads, dams, and even in nuclear reactor structures. Additives of environmental or agricultural residues are considered a source of green energy and have become the focus of attention of those interested in a green environment as it aims to improve the concrete while producing a clean environment [3] One of these environmental wastes is rice husk. Rice husk may provide a significant advantage because a high proportion of cellulose may fill the pores in the concrete mixture which contains over 90 % silica, provide excellent water resistance properties by reducing water penetration by up to 60 %, and reduces water heat It prevents the formation of cracks during concrete casting, has high resistance to chlorides, prevents the penetration of chloride ions, prevents eroding of reinforcing steel and gets rid of agricultural waste residue [5,6,7]. This is a novel technique that is premiering in this study for the manufacture of an environmental concrete additive that uses agricultural remnant waste to absorb the metals from wastewater in a plain concrete slab to investigate the flexural strength

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