Consolidating concrete canadian pinoy dating
During his research, Okamura found that the main cause of the poor durability performances of Japanese concrete in structures was the inadequate consolidation of the concrete in the casting operations.By developing concrete that self-consolidates, he eliminated the main cause for the poor durability performance of their concrete.This procedure, which is readily used today, relies on the use of the Abrams cone (Figure 1).The cone is filled in one layer without rodding and the diameter, instead of the slump of the concrete sample, is measured after the cone has been lifted .
The concept was proposed by Professor Hajime Okamura of Kochi University of Technology, Japan, in 1986 as a solution to the growing durability concerns of the Japanese government.
Most of the work still has to be completed, but with over 40 participants, this team should be able to do it in a timely fashion Several tests have already been developed worldwide to characterize the performance of a fresh self-consolidating concrete.
A few of them are briefly presented in the following paragraphs.
The dimensions may vary from one country to the other.
A rheometer is a device that applies a range of shear rates and monitors the force needed to maintain these shear rates in a plastic material. A few concrete and mortar rheometers are available on the market and have been and are still used for measuring the yield stress, viscosity and other rheological characteristics of SCC.