Characteristics of Drying Shrinkage in Mortar Using Various Industrial By-products as Fine Aggregate

抄録

High-quality aggregate has become increasingly difficult to obtain in Japan. One solution to this problem of dwindling aggregate resources is the effective use of both industrial by-products and low-quality aggregate. In this study, characteristics of drying shrinkage in mortar using various industrial by-products and low-quality aggregate were examined. Crushed sand, recycled sand, granite muck, waste tire, waste glass and two types of fly ash (Type I and Type IV) were used in place of standard sand or cement. As a result, there is a possibility that granite muck had highly utility as fine aggregate because it does not exacerbate drying shrinkage. Waste glass can be used as fine aggregate from the viewpoint of drying shrinkage when the replacement ratio against volume of standard sand is 10% and 30%. The amount of strain in mortar using non-water-absorbing material strongly correlates with mass decrement.