WUHAN Textile UNIVERSITY | WUHAN UNIVERSITY OF TECHNOLOGY

Influence of nano-TiO2 on the rheological and fresh properties of sulphoaluminate cement-based materials

The influence of nano-TiO2 (NT) on the rheological parameters, fluidity, setting time and pore structure of sulphoaluminate cement (SAC) composites is studied and the influence mechanisms are investigated by hydration heat, X-ray diffraction (XRD) and differential scanning calorimetry-thermogravimetry (DSC-TG). Results show that the addition of NT increases the apparent viscosity, shear stress and apparent density of SAC paste while decreasing its fluidity, total pore volume, average pore size and porosity and shortening its setting time. In addition, incorporating NT promotes the early hydration of SAC and accelerates the formation and precipitation of hydration products. Then, the hydration geometric model is established and visually reveals the internal structure development process of NT-modified SAC paste.

1 Introduction

For the past few years, the application of nano-particles in the field of construction and building materials has been receiving more and more attention. When cementitious composites are modified by superfine particles, functional products or materials with different characteristics from traditional materials are gained [1-8]. Many studies have shown that the mechanical properties, working performance and durability of cement-based materials can be improved to a greater or lesser extent by adding nano-particles.

As a new type of function material, nano-TiO2 has a wide range of...

Related articles:

Issue 04/2024 CHINA CONSTRUCTION THIRD BUREAU FIRST ENGINEERING CO., LTD.

Effect of styrene-acrylic latex on physical-mechanical properties and microstructure of sulphoaluminate cement paste

1. Introduction The damage of the building structure not only affects its normal use, but also has a large safety hazard. If the damaged area is not repaired in time, it will further develop, and...

more
Issue 9/2017 WUHAN TEXTILE UNIVERSITY | WUHAN UNIVERSITY OF TECHNOLOGY

Influence of nano-TiO2 on rheological and fresh properties of fly ash-cement systems

1 Introduction As a kind of regulating supplementary cementing material, fly ash (FA) is widely used in cementitious composites, because it can improve the workability and durability of cement-based...

more
Issue 8/2022 WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY | WUHAN TEXTILE UNIVERSITY | CHINA CONSTRUCTION THIRD BUREAU FIRST ENGINEERING CO., LTD.

Physical-mechanical properties and hydration microstructure of slag powder/cement system with different nanoparticles

1 Introduction Cement is the most used cementitious material in engineering construction in China. Its hardened paste is loose and porous, and the erosive substances can easily enter through the pores...

more
Issue 3/2021 WUHAN UNIVERSITY OF SCIENCE AND TECHNOLOGY | WUHAN TEXTILE UNIVERSITY | WUHAN UNIVERSITY OF TECHNOLOGY

Mechanical properties and hydration characteristics of sulfoaluminate cement-based materials containing nano silica

1 Introduction Sulfoaluminate cement (SAC) has been regarded as a green and environment-friendly high-performance special cement due to its lower energy consumption and lower CO2 emissions when...

more
Issue 02/2024 WUHAN TEXTILE UNIVERSITY

Effect of calcium formate/nano C-S-H composite on early hydration and microstructure of the GGBS-cement system under steam curing

1. Introduction Ground granulated blast-furnace slag (GGBS) is the residue formed by impurities such as SiO2 and Al2O3 and lime in the iron making process, which is collected and water quenched to...

more