| 摘要 |
PROBLEM TO BE SOLVED: To develop an input method of a preceding material, without having influence on concrete strength after hardening by the preceding material, by preventing the fact of not fulfilling the function as the preceding material, since water absorption performance of a water absorptive resin is taken away on and after a second time, even when a setting frequency of one day is two times or more, in the input method of the preceding material used when placing concrete by using a concrete pump car.SOLUTION: An input method of a preceding material using a water absorptive resin of the present invention, uses the water absorptive resin including no additive as an initiator 2, and an input quantity of the initiator 2 is 25 g-150 g, and is also set so as to satisfy an input quantity of a first time≤an input quantity on and after a second time, and an input quantity of water 8 is set so that the water absorptive resin becomes 0.1-0.8 wt.% for becoming a gel state.SELECTED DRAWING: Figure 2 |
