Compressive Strength and Resistance to Sodium Sulphate Attack of Concrete Incorporated with Fine Aggregate Recycled Ceramic Tiles

Abstract

In this experimental study, compressive strength and resistance to sodium sulphate attack of concrete incorporating recycled ceramic tiles (RCT) as fine aggregate were investigated. RCT was used as partial replacement for river sand at four levels (0%, 33%, 66%, 100%). Samples for sulphate resistance tests were immersed in 5% Na2SO4 solution for 180 days after they had been cured under water for 28 days, and were monitored for change in physical appearance, mass change and loss of compressive strength. From experimental results, RCT was found to be capable of producing light weight concrete compared to river sand. The results showed increase in compressive strength as the level of RCT content increased. On resistance to sulphate attack, sodium sulphate seems not to attack C-S-H bond which is produced in excess in RCT concrete, rather it attacks calcium hydroxide and calcium aluminate which are produced in equal amounts for both RCT and control samples. Hence, RCT might not play much direct role in concrete’s resistance to strength loss due to sulphate attack. However, the residual compressive strength of the RCT samples after the attack was seen to be much higher than that of the control samples because of their initial higher strength before the attack. This shows that RCT can improve the properties of concrete when incorporated as fine aggregates.

Performance Assessment of Compressive Strength Property of Concrete Made with Hong Soybeans Hull Ash and Groundnuts Shell Ash in the Production of Ternary Concrete

“…From the study, it was found that the silica-lime reaction requires more water in addition to water required during hydration of cement as opined by Nwankwo and Job (2014), while the immediate workability decreases, the adsorbed water might be partially released during the hardening process (Soji, et al, 2021). This phenomenon may be attributed to the physical characteristics of the pozzolana i.e., particle size distribution, specific gravity and the of fineness of the particles of the pozzolans as reported by Ambrose, et al (2023); Cordeiro, et al (2012). The slump test was performed on the fresh concrete to determine its workability (BS EN 12350: 2019) (Usman, et al 2020)…”

Performance of high strength concrete containing locust bean pod ash as cement replacement

“…The cubes (60) underwent a curing process in water at ambient temperature (28 days). The sample cubes were thereafter soaked in 10% Magnesium sulphate (MgSO4) solution, adopted from works by [44]- [46]. At 7, 14, 21, and 28 days, samples' compressive strength was evaluated.…”