The utilization of nanoparticle-blended cement while producing concrete or mortar is gaining immense significance nowadays, mainly on account of the improvements in the long-term durability characteristics of the composites. The feasibility of using cement blended with nano-\(\hbox {TiO}_{2}\) particles to produce less permeable or impermeable mortar and concrete of sufficient strength and durability requirements was investigated in the present study. The composite cement includes Ordinary Portland Cement replaced with \(\hbox {TiO}_{2}\) nanoparticles at 0%, 2%, 4%, 6%, 8% and 10% quantities by weight. The properties studied include heat of hydration, compressive strength, bond strength, water absorption, permeability and sorptivity of mortar or concrete specimens. The roughness and surface defects of coarse aggregates greatly alleviated due to the incorporation of nano-\(\hbox {TiO}_{2}\) particles in concrete specimens. The rate of heat evolution increased during early stages of hydration owing to the high fineness and additional reactive surfaces induced from the nano-\(\hbox {TiO}_{2}\) particles blended in cementitious composite. Additionally, with reference to strength and durability characteristics, the nano-\(\hbox {TiO}_{2}\)-blended composites performed relatively better than the control samples. The role of blended nano-\(\hbox {TiO}_{2}\) cement composites in reducing the interconnected matrix porosity of concrete is discussed briefly, providing evidences from scanning electron microscope (SEM) observations.

如今，在生产混凝土或砂浆时使用纳米颗粒水泥的重要性日益提高，这主要是由于复合材料的长期耐久性得到了改善。在本研究中，研究了使用掺有纳米\（\ hbox {TiO} _ {2} \）颗粒的水泥生产渗透性或不渗透性较低的砂浆以及具有足够强度和耐久性要求的混凝土的可行性。复合水泥包括用\（\ hbox {TiO} _ {2} \）代替的普通硅酸盐水泥。以重量计0％，2％，4％，6％，8％和10％数量的纳米颗粒。研究的性能包括水合热，抗压强度，粘结强度，吸水率，砂浆或混凝土试样的渗透性和吸水性。由于在混凝土样品中掺入了纳米\（\ hbox {TiO} _ {2} \）颗粒，大大降低了粗骨料的粗糙度和表面缺陷。由于高细度和掺入水泥基复合材料中的纳米\（\ hbox {TiO} _ {2} \）颗粒引起的高活性和额外的反应性表面，在水合早期阶段，放热速率增加。此外，关于强度和耐久性特征，纳米\（\ hbox {TiO} _ {2} \）混合的复合材料的性能要比对照样品好。简要讨论了混合纳米\（\ hbox {TiO} _ {2} \）水泥复合材料在降低混凝土的互连基质孔隙率中的作用，提供了扫描电子显微镜（SEM）观察的证据。