ABSTRACT

We didn't have any question on the definition of terminology in advance. But

we have some questions from different organizations in advance for the questionnaire which were sent a month ago. For chemical shrinkage, we have reply from French people, LAFARGE Company. They discussed together, they had some opinions as a Institute. Their question is related to the depth of sample, and it should be thin enough for the water to penetrate completely. The second point is some effect of entrapped water under the rubber plug. These points can be taken care of. In our proposal, we fix the water-cement ratio to 0.50. We made different measurements on different thickness of specimen and we are quite sure that no self-desiccation can occur for the depth proposed if we use water-cement ratio 0.5. If you would like to make experiment for the water-cement ratio less than 0.5, the thickness of sample becomes very important. In another question, which we had on chemical shrinkage measurement, is the final expression of the chemical shrinkage. We use the percent expression in stead of the amount of chemical shrinkage in terms of per gram of cement. Question is that this definition is quite different from the definition in nature. We think this value can be converted to percentage expression using the following equation.