Absorption and strength properties of lightweight foamed concrete with egg shell powder as partial replacement material of cement

Abstract

Around 85 thousand tonnes of egg shell waste were yield in Malaysia at 2017, and when its utilization rate is low and not treated and disposed properly, it might result in environmental problem. By partially replacing cement with egg shell powder, the waste can be reduced and meanwhile reduce cement production that results in depletion of natural limestone and emission of carbon dioxide. Therefore, this study was carried out by aiming to mitigate the environmental issue by reducing eggshell wastes and pure cement production, and meanwhile, to promote the application of lightweight foamed concrete. The objective of this study is to investigate the effects on spread diameter, stability water absorption, initial surface absorption, sorptivity, and compressive strength of lightweight foamed concrete with fresh and hardened density of 1000 ± 50 kg/m3 and 1400 ± 50 kg/m3 when the cement is partially replaced by egg shell powder at replacement levels of 0%, 2.5%, 5%, 7.5%, and 10% by mass. The results showed that with incorporation of egg shell powder at all levels, the water absorption, initial surface absorption, sorptivity were improved, but spread diameter was reduced. Besides, stability of foam and compressive strength were improved in overall at replacement level of up to 7.5%. Therefore, it is feasible to use up to 7.5% egg shell powder as partial cement replacement material.

Effect of Ceramic Dust as Partial Replacement of Cement on Lightweight Foamed Concrete

“…For the control mix, which is 0% replacement level, the compressive strength performance index per 1000 kg/m 3 is 1.56 MPa 3 , 2.52 MPa, and 1.99 MPa for water-cement ratio 0.52, 0.56, 0.60 respectively. The results show a similar result with the study from [30], [31] at about 1200 kg/m 3 density of foamed concrete, which is below 3.5 MPa. From Fig.…”

Research on High- and Low-Temperature Characteristics of Bitumen Blended with Waste Eggshell Powder

“…At present, a substantial amount of research is being conducted on eggshell applications, and there have been relatively important results in many aspects [33][34][35][36][37][38]. A novel composite nanomaterial, eggshell/Ag, can effectively promote the catalytic degradation of organics and has substantial application prospects in the resolution of problems encountered in microbial treatment of sewage [39].…”

Eggshells from Different Countries of Origin and Their Sustainable Application as a Partial Replacement of Cement

“…Likewise, eggshells have also been effectively blended in cement along with silica fume (SF) [19][20][21], fly ash (FA) [22][23][24], rice husk ash (RHA) [25], rice straw ash (RSA) [26], glass powder [27], palm oil fuel ash (POFA) [28][29][30][31], and bagasse ash [32]. In addition, eggshells have been used in special concrete as well, both in uncalcined and calcined forms like Foamed concrete [33,34], self-compacting concrete [35][36][37][38][39], and geopolymer concrete [40]. In general, using eggshells either in an uncalcined or calcined state has a positive impact on the hydration kinetics of cementitious materials [41][42][43].…”