多項(xiàng)選擇題
A.把水加入鍋里,再加入水泥,把鍋固定在固定架上,上升至工作位置B.立即開動(dòng)機(jī)器,先低速攪拌30s±1s后,在第二個(gè)30s±1s開始的同時(shí)均勻地將砂子加入C.把攪拌機(jī)調(diào)至高速再攪拌30s±1sD.停拌90s,在停拌開始的15s±1s內(nèi),將攪拌鍋放下,用刮刀將葉片、鍋壁和鍋底上的膠砂刮入鍋中,再在高速下繼續(xù)攪拌60s±1s
A.450g±5g水泥B.450g±2g水泥C.1350g±5g砂子D.225mL±1mL水
A.80μm方孔篩篩余不大于10%B.45μm方孔篩篩余不大于30%C.80μm方孔篩篩余不大于30%D.45μm方孔篩篩余不大于10%
單項(xiàng)選擇題
A.3B.5C.6D.8
A.140.5mLB.28.1%C.增加用水重新測定D.減少用水重新測定
A.6.5MPaB.6.6MPaC.6.7MPaD.7.1MPa
A.46.7MPaB.45.6MPaC.46.3MPa
A.120minB.150minC.180minD.210min
A.(24±1)hB.(24±2)hC.(24±3)hD.(24±4)h
A.100g,0.1gB.200g,0.1gC.500g,1gD.1000g,1g
A.142.0mLB.141.5mLC.142.5mLD.145.0mL