超细碳酸盐岩粉高性能混凝土

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1、使用材料：水泥：鹿泉鼎鑫普通硅酸盐水泥P.O42.5粉煤灰：北京石景山热电厂砂：中砂碎石：5－20mm碎石高效减水剂：巴斯福化学建材GleniumAce68聚羧酸高效减水剂，超细碳酸盐岩粉：用北京地区石灰石尾矿和白云石尾矿经磨细加工而成，细度用激光衍射粒度分布测试方法检测。粒度分布控制在：D(50)≤3.5微米，D(90)≤12微米。化学成分见表：矿石品种CaOMgOK2ONa2OSiO2Al2O3Fe2O3烧失量石灰石尾矿45.742.591.190.256.523.040.8239.58优质石

2、灰石53.670.310.15----1.670.450.1542.85成份MgOCaOSiO2Al2O3Fe2O3K2ONa2OPS含量（%）21.3530.020.660.080.180.310.010.050.06石灰石化学成分表（％）白云石化学成分表（％）材料配合比A配合比B配合比C配合比D配合比E配合比FP.O42.5水泥130144150162195130高钙粉煤灰130144150162195-----------磨细石灰石粉100112120126150100低钙粉煤灰------

3、-------------------------------------------------130机制中砂9228848557876779225~20mm碎石10009961005104210591000水130130130130130130GLENIUMACE680.4%0.4%0.4%0.4%0.4%0.4%水胶比0.500.450.430.400.330.50水粉比0.360.330.310.290.240.36坍落度(mm)210220210215220205抗压强度(MPa)3d2

4、0.724.528.232.841.021.97d28.132.138.544.552.926.428d42.145.955.261.469.340.360d50.554.061.871.476.349.4掺石粉混凝土配合比（kg/m3）用水泥、磨细矿渣和超细碳酸盐岩粉构成三元复合胶凝材料，掺加聚羧酸高效减水剂。根据下述所示的材料和表6-1-1中所示的混凝土配合比，配制混凝土，测定工作性能抗压强度。表中Mix01-Mix06为掺超细碳酸盐岩粉的混凝土配合比，胶结材料中掺加大量磨细矿渣，水泥和磨细矿

5、渣各占50%；超细碳酸盐岩粉占混凝土中粉体材料总量的20%-37%。掺超细碳酸盐岩粉未掺超细碳酸盐岩粉Mix01Mix02Mix03Mix04Mix05Mix06Mix07Mix08Mix09Mix10Mix11Mix12水125125127127127127165165165165165165水泥110120130150170200318226195302370420磨细矿渣110120130150170200098128100100100超细碳酸盐粉1301101001001101000000

6、00砂950951948892832757963960960828744706碎石103010311026104610601091100410011001105510711059GleniumAce682.12.12.162.42.73.01.61.621.622.012.352.6水胶比0.560.520.490.420.380.320.520.510.510.410.350.32水／粉0.360.360.350.320.280.250.520.510.510.410.350.32砂率，(%)4

7、84848464441494949444140胶结材合计220240260300340400318324323402470520粉体材料合计350350360400450500318325323402470520坍落度（mm）225230225225230225205225225225230225抗压强度（MPa）3d27.328.731.037.144.853.517.616.014.827.935.040.67d38.439.343.049.457.264.832.833.332.537.94

8、6.259.928d46.048.351.660.368.474.940.343.542.850.257.967.660d53.054.357.465.974.581.143.050.650.459.867.573.2含水泥、粉煤灰、超细碳酸盐岩粉，掺加聚羧酸高效减水剂的三元复合胶凝材料混凝土配合比由水泥、粉煤灰和超细碳酸盐岩粉构成三元复合胶凝材料，掺加聚羧酸高效减水剂。根据下述所示的材料和表6-2-1中所示的混凝土配合比，配制混凝土，测定抗压强度。表3中Mix13-Mix17为掺