Analysis of Fresh Concrete by the Pressure-Filter and Constant-Volume Methods

摘要

This report describes work carried out in a site laboratory to estimate the repeatability and reproducibility of two methods for analysing fresh concrete, namely, the constant-volume method (RAM-Rapid Analysis Machine) developed by the Cement and Concrete Association and the pressure-filter method devised by Bavelja of Messrs Sandberg. The work has shown the need for practical site-sampling techniques; it has highlighted the problems that arise in organising multiple tests on samples from the same batch of concrete, and it has shown the necessity to provide adequate drainage facilities to deal with the large volume of cement in suspension issuing from the Rapid Analysis Machines. (Copyright (c) Crown Copyright 1981.)