Meanwile , the frost - heave stress of all concrete with different w / c ratio decreased with the adding of mineral additives , the decreaseing extent of concrete with high w / c ratio is more bigger between them 同时,掺入矿物掺合料的不同水灰比混凝土的冻胀应力都减小,其中高水灰比混凝土减小幅度较大。
The conclusion shows the method fits and the mineral admixture can reduce the pore porosity of concrete and improve the compactibility and freezing resistance of concrete 结论对于混凝土冬季施工更合适未用自然变低温养护的方法,掺入适量的掺合料能使混凝土孔隙率显著降低,使混凝土更加密实,提高混凝土的抗冻性。
Based on analysis of research history and status of mineral admixture , the paper discusses the shortcomings and problems of current reseach , and finally suggests the trend of mineral admixture research 通过对矿物掺合料研究历史和研究现状的分析,探讨了当前研究的主要缺陷及存在的问题,并展望了下一步的研究方向。
Final results of experiment indicate that adding some synthetic fiber to hpc with the mineral admixture or cement mortar can decrease cracking 95 % at least and enhance the durability of concrete 试验结果表明,在掺活性掺合料高性能混凝土中掺加一定量合成纤维可以使混凝土或砂浆减裂95 %以上,并可以提高混凝土耐久性。
Results show that c2s , c3s and ca ( oh ) 2 in hydration sample with steel - making slag powder are more than those in hydration sample with fly ash or blast furnace slag . sequence of capacity bonding water 结果表明,含掺合料胶凝材料的水化产物形貌与纯硅酸盐水泥的水化产物形貌比较相似,在较短龄期水化样的孔隙中能明显观察到针状
Hill sand can be used in producing high performance concrete of hill sand based on the research of high strength concrete of hill sand , hydro - concrete of hill sand and the usage of fly ash 贵州地区对山砂多年来的应用也说明,山砂完全可以在高强山砂混凝土、流态山砂混凝土、粉煤灰掺合料应用等研究成果的基础上,研究开发出山砂高性能混凝土。
With a slab test of restricted shrinkage , the effect of polypropylene fiber , steel fiber and expansive agent on early - age plastic shrinkage and cracking of concretes with high content mineral admixtures is investigated 摘要采用平板限制收缩试验法,研究了聚丙烯纤维、钢纤维与膨胀剂及其复合技术对大掺量矿物掺合料混凝土早期塑性收缩开裂的影响。
Based on the analysis of the application and manufacture mechanism of additives , a kind of additive of anti - inhibition and resistance - permeability is produced by means of orthogonal experimental design method , and the influence regularity of every ingredient is discussed 摘要通过对掺合料应用及其制备原理进行分析,采用正交设计试验方法制备了一种阻裂抗渗掺合料。
Composition feature of hydration products of cementitous materials with steel - making slag powder is studied by xrd and dta - tg and influence of mineral additives on hydration rate also investigated by chemical bond water of ultimate hydration products 利用xrd 、 dta一tg研究了含钢渣粉胶凝材料水化产物的组成特征,并用极限水化产物的结合水量推算了掺合料对水泥水化速率的影响。
Only when superplasticizer , admixture rf , early - hardening sulphoaluminate cement and aggregate of suitable size are used , high performance repairing concrete can be prepared with high - early strength and high fluidity and good interfacial bond property 必须选用高效减水剂、 rf掺合料、快硬硫铝酸盐水泥、合适粒径的骨料,才能配制出便于施工操作、早期强度较高、新老界面粘结较好的混凝土修补材料。