Bond and Tensile Capacity of Lightweight Aggregates


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Title: Bond and Tensile Capacity of Lightweight Aggregates

Author(s): Gisela Wagner Nichols and W. B. Ledbetter

Publication: Journal Proceedings

Volume: 67

Issue: 12

Appears on pages(s): 959-962

Keywords: aggregate shape and texture; bond (paste to aggregate); cement pastes; density (mass/volume) ; tensile strength;lightweight aggregates; research.

Date: 12/1/1970

The tensile capacity of selected structural lightweight aggregates were investigated, along with the cement paste-aggregate bond capacity in shear and tension. A device was developed to evaluate an individual aggregate’s tensile capacity bond capacity to cement paste. Using this a and sevice, seven lightweight aggregate d the following results obtaine per were tested and The tensile capacity of the lightweight aggre-gates tested were very low, generally less than the aggregate-cement paste bond strength, regardless of aggregate surface texture. The higher the bulk specific gravity of the lightweight aggregate, the higher the tensile strength of the aggregate. Within the range of cement paste strengths investigated, the paste strength had no influence on the aggregate cement paste bond strength.