Abstract
Lightweight aggregate concrete is made using different types of cements, mineral admixtures, and aggregates. These material variations influence the degree and rate of deterioration. This chapter examines durability of lightweight aggregate concrete to several chemical attacks—acid resistance, alkali-aggregate reaction, carbonation and corrosion, and chloride ion penetration. The tests show that the lightweight aggregate concrete with CEMOS is most resistant to hydrochloric and lactic acid. This is because of the hydrophobic property introduced by the polymer CEMOS in the lightweight aggregate concrete. The lightweight aggregate concrete does not contain alkali-sensitive aggregates as in the case of normal weight concrete. The insulating and nonstructural concretes have higher carbonation rates. The higher water-to-cement ratio leads to a more open structure, which enhances the penetration of carbon dioxide. The quality of concrete, with respect to its resistance to the penetration of carbonation, may be categorized by maximum anticipated carbonation coefficients of 4 and 8.
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