| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a low environmental load type concrete not only small in carbon output basic unit, but high in compressive strength, having the effect of small calorific value of hydration, or the like and exhibiting a large contribution for environmental problems. SOLUTION: This low environmental load type concrete is prepared by blending cement, anhydrous gypsum generated as an industrial by-product and having pH <=4.5 and lime stone powder and has >=30 N/mm2 compressive strength in 28 day material age and <=70 kg/m3 carbon output basic unit. Further, siliceous fine powder generated as the industrial by-product is desirably blended and the unit quantity of cement is <=280 kg/m3.</p> |
