Performance of Lightweight Foamed Concrete with Replacement of Concrete Sludge Aggregate as Coarse Aggregate

Abstract

The use of waste materials in construction industry is very essential in order to reduce the depletion of natural sources. Thus, this study is focused to determine the performance of lightweight foamed concrete made with concrete sludge aggregate (CSA) and to determine the optimum proportion of CSA that can gives optimum compressive strength. Strength is one of the most important properties of concrete since the first consideration in structural design is that the structural elements must be capable of carrying necessary loads. CSA has been use as partial substitution to normal coarse aggregate to manufacture structural lightweight foamed concrete. Two different sets of CSA proportion have been prepared with foamed injected through mixing processes. 25% and 50% of CSA for production of lightweight concrete were designed according to proper mix design. It is found that maximum percentage of CSA that contribute to the highest compressive strength of 25MPa is 50% of CSA replacement. Its density is 1837 kg/m3 with water adsorption of 16.35%. The usage of concrete sludge aggregate as construction material can be further promoted in order to solve major environmental issues.

Thermal Performance and Electrical Sensitivity of Foamed Concrete Incorporating Ground Granulated Blast-Furnace Slag (GGBS)

“…The water permeability of foamed concrete was evaluated using this criterion. The total water absorption rate of foamed concrete is influenced by its porosity and compactness to a certain degree [61]. In the context of foamed concrete, it is important to note that high rates of water absorption can adversely impact the durability of harmful ions and solutes that have infiltrated the cementitious matrix through the pores, along with the water [62].…”

The Influence of Pulverized Fuel Ash (PFA) on the Thermal and Transport Properties of Foamed Concrete

“…The reduced water absorption seen in specimens incorporating PFA can be attributed to the presence of unreacted particles. These particles improved the porosity nature of the mixtures by effectively filling spaces and pores [71]. The incorporation of PFA particles, which possess a smaller particle size compared to cement particles, into the PFC mixture resulted in the filling of gaps and cavities, hence causing a reduction in water absorption [72].…”

Foam Concrete: A State‐of‐the‐Art and State‐of‐the‐Practice Review

“…So far, synthetic, protein-based, composite and synthetic surfactants have been derived and developed, while the most frequently used are synthetic and protein-based ones [64]. Filler: Various fillers such as silica fume, fly ash, limestone powder, granulated blast furnace slag, and fly-ash ceramicite [61] have been widely adopted for the purpose to enrich FC mechanical performances [65][66][67]. Addition of these fillers is helpful to improve mix proportion design, long-term strength, and reduce costs.…”