| 摘要 |
PROBLEM TO BE SOLVED: To provide a dust reducing agent excellent in powder pressure transportation property, suppressing jet flow property, good in dust reducing effect, and high in workability.SOLUTION: There is provided a powder type dust reducing agent containing 42 to 90 pts.mass of talc, 0.1 to 10 pts.mass of bentonite, 0.5 to 20 pts.mass of cellulose ether, 0.1 to 6 pts.mass of diutan gum, 0.1 to 2 pts.mass of polyacrylamide and 0.5 to 20 pts.mass of a deforming agent based on total 100 pts.mass of the talc, the bentonite, the cellulose ether, the diutan gum, the polyacrylamide and the deforming agent, and the deforming agent is one or more kinds selected from a mineral oil-based deforming agent, alkylene oxide addition product-based deforming agent and silicone-based deforming agent. There are also provided a spray concrete and a spray method using the same. |
