纳米sio2和纳米fe2o3对水泥砂浆抗压强度、抗折强度、孔隙率和电阻率的综合影响

IF 1.1 4区工程技术 Q3 CONSTRUCTION & BUILDING TECHNOLOGY

Materiales de Construccion Pub Date : 2018-03-05 DOI:10.3989/MC.2018.10716

M. Sanjuán, C. Argiz, J. Gálvez, E. Reyes

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引用次数: 13

摘要

研究了纳米氧化铁和纳米二氧化硅水泥砂浆的抗压强度、抗折强度、孔隙率和电阻率等性能。无定形二氧化硅与硅酸钙(c3s和c2s)水化形成的氢氧化钙反应，是火山灰材料的主要成分。火山灰的反应速率不仅与无定形二氧化硅的量成正比，而且与可用于反应的表面积成正比。随后，在砂浆中加入纳米fe2o3和纳米sio2颗粒有望改善砂浆性能。实验结果表明，在第7天和第28天，纳米氧化铁和纳米二氧化硅颗粒砂浆的抗压强度低于参考砂浆。结果表明，纳米颗粒并不能在任何情况下都能提高机械强度。通过压汞孔隙度(MIP)测量、孔隙尺寸分布(PSD)、总孔隙度和临界孔径监测的连续微观结构进展也证实了这一结果。

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Combined effect of nano-SiO 2 and nano-Fe 2 O 3 on compressive strength, flexural strength, porosity and electrical resistivity in cement mortars

The compressive strength, flexural strength, porosity and electrical resistivity properties of cement mortars with nano-Fe 2 O 3 and nano-SiO 2 are studied. Amorphous silica is the main component of pozzolanic materials due to its reaction with calcium hydroxide formed from calcium silicate (C 3 S and C 2 S) hydration. The pozzolanic reaction rate is not only proportional to the amount of amorphous silica but also to the surface area available for reaction. Subsequently, fine nano-Fe 2 O 3 and nano-SiO 2 particles in mortars are expected to improve mortar performance. The experimental results showed that the compressive strength of mortars with nano-Fe 2 O 3 and nano-SiO 2 particles were lower than those obtained with the reference mortar at seven and 28 days. It was shown that the nano-particles were not able to enhance mechanical strength on every occasion. The continuous microstructural progress monitored by mercury intrusion porosimetry (MIP) measurements, pore-size distribution (PSD), total porosity and critical pore diameter also confirmed such results.

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来源期刊

Materiales de Construccion 工程技术-材料科学：综合

CiteScore

3.20

自引率

9.50%

发文量

审稿时长

>12 weeks

期刊介绍： Materiales de Construcción is a quarterly, scientific Journal published in English, intended for researchers, plant technicians and other professionals engaged in the area of Construction, Materials Science and Technology. Scientific articles focus mainly on: - Physics and chemistry of the formation of cement and other binders. - Cement and concrete. Components (aggregate, admixtures, additions and similar). Behaviour and properties. - Durability and corrosion of other construction materials. - Restoration and conservation of the materials in heritage monuments. - Weathering and the deterioration of construction materials. - Use of industrial waste and by-products in construction. - Manufacture and properties of other construction materials, such as: gypsum/plaster, lime%2