BEIJING JIAOTONG UNIVERSITY I TSINGHUA UNIVERSITY BEIJING

Flowability and microstructure of fresh ­cement pastes in the presence of superplasticizer, latex and asphalt emulsion

1 Particle size distribution curve of the cement used in this study All authors
1 Particle size distribution curve of the cement used in this study
All authors
2 The variation of flowability of FCPs with the addition of different additives
2 The variation of flowability of FCPs with the addition of different additives
3 Schematic illustration of the effects of additives of different sizes on the microstructure of fresh cement pastes at varied addition levels
3 Schematic illustration of the effects of additives of different sizes on the microstructure of fresh cement pastes at varied addition levels
4 ESEM images of the FCPs 5 min after mixing [16]
4 ESEM images of the FCPs 5 min after mixing [16]
5 Optical images of the structure of cement grains in cement suspensions
5 Optical images of the structure of cement grains in cement suspensions
6 Influence of three types of additives on the particle size distribution of cement ­suspensions
6 Influence of three types of additives on the particle size distribution of cement ­suspensions
7 ESEM images of the FCPs with latex 5 min after mixing
7 ESEM images of the FCPs with latex 5 min after mixing
8 Optical images of the organizational structure of cement grains in the cement suspensions with latex
8 Optical images of the organizational structure of cement grains in the cement suspensions with latex
9 ESEM images of the FCPs containing asphalt emulsion 5 min after mixing
9 ESEM images of the FCPs containing asphalt emulsion 5 min after mixing
10 Optical images of the organizational structure of cement grains and asphalt particles in cement suspensions containing 10 % asphalt
10 Optical images of the organizational structure of cement grains and asphalt particles in cement suspensions containing 10 % asphalt
11 2-D images of blank fresh cement paste (a) and asphalt emulsion (b)
11 2-D images of blank fresh cement paste (a) and asphalt emulsion (b)
12 Laser scanning images of the blank FCP: a), b), c) and the pastes containing asphalt emulsion at an A/C of 0.35 d), e), f)
12 Laser scanning images of the blank FCP: a), b), c) and the pastes containing asphalt emulsion at an A/C of 0.35 d), e), f)
13 Laser scanning images of FCPs containing asphalt emulsion at an A/C of 0.6 a), b), c) and an A/C of 1.0 d), e), f)
13 Laser scanning images of FCPs containing asphalt emulsion at an A/C of 0.6 a), b), c) and an A/C of 1.0 d), e), f)

This study investigated the effects of polycarboxylate superplasticizer, poly(styrene-acrylate) latex and asphalt emulsion, which range in molecular/particle size from nanometres to microns, on the microstructure and flowability of fresh cement pastes (FCPs).

1 Introduction

High performance concrete (HPC) is widely used in the construction industry at present due to its excellent properties [1]. The improved properties of HPC are closely related to the various additives that are incorporated in the concretes and mortars to achieve the desired properties. Superplasticizers are usually used to reduce the water/cement ratio (W/C) with the aim of enhancing the strength and durability of the concrete in order to satisfy the construction requirements [2–6]. Polymer latexes are often employed as cement mortar and concrete modifiers to improve the...

Find out more in

ZKG 12/2017

Find out more in

ZKG 12/2017

Ressort:  Application
subscription Content
TEXT Zhang Yanrong and Cai Xiaopei, Beijing Jiaotong University, Department of Civil Engineering, ­Beijing/China; Kong Xiangming, Tsinghua University, Department of Civil Engineering, Beijing/China
Corresponding authors: Cai Xiaopei, Kong Xiangming

Related articles:

Issue 10/2015 TSINGHUA UNIVERSITY BEIJING

Microstructure model of fresh cement paste in the presence of superplasticizer

1 Introduction Flowability has been considered one of the important properties of fresh cement-based materials due to their essential roles in the construction process as well as their effects on the...

more
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 3/2023 US RE49 415 E

Particle packed cement-SCM blends

(22) 06.03.2019 (45) 14.02.2023 (57) Cement-SCM blends employ particle packing principles to increase particle packing density and reduce interstitial spacing between the cement and SCM particles....

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 4/2019 TECHNISCHE UNIVERSITÄT BERLIN

Accelerating cement hydration with C-S-H seeds

1 Introduction According to the European climate and energy policy, the emission of greenhouse gases is to be reduced by 40?% by 2030 compared to 1990 [1]. The German cement industry contributes...

more