Development of Nuclear Density Transducer for Measuring Cement Pulverized Fuel Ash Grout with High Accuracy

Pulverized fuel ash is used as a replacement for a part of cement in grouting engineering and density of cement pulverized fuel ash grout is a critical parameter for the grouting quality. In order to measure grout density dynamically and accurately, a new type nuclear density transducer was developed based on the basic principle of interaction between γ-ray and substance. The nuclear density transducer is suitable to measure almost all types of cement pulverized fuel ash grout with different water-pastern ratio, which is widely performed in dam curtain grouting and foundation reinforcement grouting. Principle and key technical points of the nuclear density transducer were discussed in this paper. In addition, the experimental researches of the new transducer were described.