Sunday, September 11, 2022
Wednesday, September 14, 2022
Sunday, September 11, 2022
Wednesday, September 14, 2022
Wednesday, September 14, 2022
Friday, September 16, 2022
Sunday, September 11, 2022
问题:某混凝土工程,所用配合比为水泥:砂:碎石=1:1.98:3.90...
Wednesday, September 14, 2022
问题:进行混凝土外加剂收缩率比试验,恒温恒湿室的温度为()。A、(20±2)℃B、(20±3)℃C、(20±5)℃D、没规定...
Sunday, March 24, 2024
Monday, May 15, 2023
Wednesday, September 14, 2022
问题:依据GB8076标准,外加剂匀质性指标要求在生产厂家控制值相对量...
Wednesday, September 14, 2022
问题:依据GB8076标准,掺高性能减水剂或泵送剂的基准混凝土砂率可以是()。A、40%B、43%C、45%D、47%E、49%...
Sunday, October 16, 2022
问题:粉煤灰可以改善混凝土拌合物的流动性、保水性、可泵性以及抹面性等性能。...
Saturday, February 17, 2024
Wednesday, September 14, 2022
问题:现有一个大体积混凝土工程,选择粉煤灰水泥最合适。...
Sunday, January 14, 2024
问题:以各种高效减水剂为主要组分,再复合各种适量的缓凝组分或其他功能性...
Wednesday, September 14, 2022