Title:
The Point-Load Test for Tensile Strength Estimation of Plain and Fibrous Concrete
Author(s):
P.J. Robins
Publication:
Symposium Paper
Volume:
82
Issue:
Appears on pages(s):
309-326
Keywords:
concrete cores; concretes; fiber-reinforced concretes;
nondestructive tests; tensile strength; tension tests.
DOI:
10.14359/6561
Date:
9/1/1984
Abstract:
Whilst compressive testing is by far the most common method of testing cores, there exists a need for a method of tensile strength estimation. The point-load test is investigated for its potential to satisfy this need, and the results of over 800 point-load core tests carried out on a plain, fibrous and sprayed fibrous concretes are discussed. A good straight-line relationship between flexural strength and 68mm core point-load strength is obtained for both plain and fibrous concretes. The average values of the coefficient of variation of the point-load strengths for plain and fibrous concretes were both between 8 and 9%; this compares with a value of 6% for the flexural strengths. The point-load method is shown to be of particular potential for assessing the strength properties of sprayed fibrous concretes.