Effect Of Crumb Rubber On Compressive Strength Of Fly Ash Based Geopolymer Concrete

Abstract

Abstract. This study explores the effect of different percentage of crumb rubber on compressive strength of fly ash based geopolymer concrete. This research attempted to produce rubberized geopolymer concrete as an environmentally friendly, lightweight and durable product. Crumb rubber with ranged size from 73 µm to 375 µm was used in order to replace fine aggregates in geopolymer concrete. The replacements of crumb rubber were 0%, 5%, 10%, 15% and 20% in the fly ash based geopolymer concrete. The ratio of fly ash to alkaline activator was 2.5 and the ratio of Na2SiO3 to NaOH was fixed at 2.0. After the curing process, the strengths of the samples were tested on days 7 and 28. The results show that there is a reduction in all compressive strength for crumb rubber mixture, but still higher than normal rubberized concrete. Rubberized geopolymer concrete is a suitable solution in some non structural applications.

Mechanical and Fresh Properties of Multi-Binder Geopolymer Mortars Incorporating Recycled Rubber Particles

“…A total of 39 mixes that include both those with rubber and non-rubberised reference mixes, were however collated in a database, of which nine are from this paper. These include largely FA-based GGMs [29,32,33], and the multi-binder systems from this paper which have a high proportion of GGBS. The rubber replacement was largely below 30% [29,33], but two investigations reported full replacement of mineral aggregates by recycled rubber [32,34].…”

“…Rubberised geopolymer mixes (RuGM), mortars or concrete, in which the part of mineral aggregates and the cement based matrix are replaced by recycled rubber and industry by-products, respectively, combine the environmental benefits of using both waste and recycled materials in construction materials [32][33][34][35][36][37]. The lower elastic modulus of geopolymer systems compared to conventional cement-based materials can provide better compatibility with the added rubber particles.…”

“…Apart from one study [22], research on the influence of incorporating microsilica (MS) in alkali activated systems is lacking to date [32]. Additionally, studies on two-part RuGM are limited [33][34][35][36][37], and those on one-part RuGM are non-existent [38]. This study aims at developing one-part FA/GGBS/MS CGM and RuGM systems that are safe and effective for on-site use, as well as have appropriate durability, enhanced mechanical and environmental performance for structural applications.…”

Study of Characteristic Physical and Mechanic of Foamed Lightweight Concrete with Fly Ash Added for Wall Materials

“…Foamed lightweight concrete effect of the percentage of foam in lightweight concrete (Othuman Mydin 2013). The more the percentage of foam will be the lower of the density and compressive strength (Azmi et al, 2016). The selfweight foamed lightweight concrete will reduce the structure load and will significantly reduce the dimensions of the structural components as well as those that impact on material savings (Hájek, Decký, and Scherfel).…”

Os efeitos da incorporação de resíduos de pneus nas propriedades de compósitos a base de geopolímero

“…O concreto geopolimérico com 2 e 6% em massa de borracha residual foi capaz de satisfazer maior perda de transmissão sonora e melhor absorção sonora em comparação com amostras de concreto convencionais. O aumento do isolamento acústico com o aumento da adição de borracha no geopolímero também foi observado porWongsa et al (2018) Azmi et al (2016). exploraram o efeito de diferentes porcentagens de borracha triturada na resistência à compressão de concreto geopolimérico a base de cinzas volantes, produzindo um material ecológico, leve e durável.…”