P·O52.5R水泥的生产试验研究

通过小磨试验确定助磨剂的掺加量,在大磨中通过混合材、细度、比表面积、颗粒级配等参数的调整,生产出优质的P.O52.5R水泥。试验结果表明,生产优质的P.O52.5R水泥控制指标为:混合材掺加量在5%以内、比表面积350 m2/kg左右、细度≤2.5%(R45μm筛余)、3μm～32μm之间的颗粒含量大于70%。另外,还对水泥中掺入矿渣粉进行了试验,试验结果表明:水泥生产中随着矿渣粉的掺入,水泥的3 d强度逐渐降低,但掺量在10%以内,水泥的28 d强度接近或者高于未掺矿渣粉的试样。当矿渣粉掺量增加到15%时,水泥的28 d强度也开始下降。

Study on experimental production for P.O 52.5R cement

By means of small testing grinder, dosingquantity of grinding-aid can be determined. Inproduction cement mill, high quality P.O 52.5R cementcan be manufactured by means of adjusting theadmixture proportion, and/or parameters like fineness,s.s.a (specific surface area) value, and particle sizegrading etc. Experimental result shows that thecontrolling targets for high quality P.O 52.5R cementproduction will be as follows: intermingled admixtureshould be ranged within 5%, s.s.a value should be about350 m2/kg, ...