Effects of Fly Ash on Mechanical Properties of Concrete

Abstract

Cement is a common and widespread building material over the world. Similarly, carbon dioxide emissions have been significantly increased due to cement production. Alternative low-carbon binders rather than cement have been progressively sought in recent years. Fly ash was found as an available option, since it is being largely disposed annually as a waste material. In this research several studies have been reviewed and recent applications of fly ash on concrete specification, including strength and fracture toughness of green concrete have been perused. Furthermore, transport properties of high volume fly ash after exposure to high temperature and influence of curing temperature on strength development of fly ash-recycled concrete aggregate blends have been investigated. The investigated test results showed that the properties of composites incorporating fly ash depend on the age of the concrete. Test results also revealed that transport properties of concrete increased notably after exposure to 400cº and the results achieved on fly ash-recycled concrete aggregate led to the conclusion that 15% FA is the optimum blend for road stabilization applications.

Prediction of Fresh and Hardened Properties of Self-Compacting Heavy-Weight Concrete Using Response Surface

“…As seen in Table 6, the W/C ratio significantly affects the compressive strength and the compressive strength of the same dosage mixes decreases as the W/C ratio increases. It can be said that the amount of fly ash has great effects on the fresh and hardened properties of SCHWC (Hanafiah, Saloma, Victor, & Amalina, 2017;Zabihi-samani, Mokhtari, & Raji, 2018).…”

Municipal solid waste incineration residues recycled for typical construction materials—a review

“…However, cement manufacturing industry is energy-intensive and emits a considerable amount of CO 2 and other greenhouse gases, which is considered to be a challenge to cement industry. 71,72 It is estimated that 850 000 kcal of energy and 1.7 tons of natural raw materials were consumed as well as 0.85 tons of CO 2 released approximately for the production of one ton of cement clinker. 17 It is a fact that cement industry has large pressure on reducing its CO 2 emission.…”

Performance of Concrete MRF at Near-Field Earthquakes Compared to Far-Field Earthquakes

“…During the earthquake loading, the behavior of reinforced concrete elements becomes inelastic at joints location. The precise method for in capturing the nonlinearity would be to consider the mechanical properties of concrete [14] and steel reinforcement in inelastic range. However, in this study, elastic elements along with plastic hinges were used in the numerical model to account for the nonlinear behavior of the 2-D structural frames, [15].…”