A Conceptual Model Focusing on Internal Flocculation Structures and Water Film Thickness for Analyzing Fresh Properties of Cement Paste Containing Attapulgite

2021 ◽  
Author(s):  
Hengrui Liu ◽  
Zhenghong Tian ◽  
Xiao Sun ◽  
Yuanshan Ma ◽  
Haoyue Fan
Keyword(s):  
Film Thickness ◽  
Conceptual Model ◽  
Cement Paste ◽  
Water Film ◽  
Fresh Properties ◽  
Water Film Thickness

scholarly journals A Study on the Relationships between Water Film Thickness, Fresh Properties, and Mechanical Properties of Cement Paste Containing Superfine Basalt Powder (SB)

Materials ◽  
2021 ◽  
Vol 14 (24) ◽  
pp. 7592
Author(s):  
Hengrui Liu ◽  
Zhenghong Tian ◽  
Haoyue Fan
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Film Thickness ◽  
Cement Paste ◽  
Water Film ◽  
Mineral Admixtures ◽  
Rheological Parameters ◽  
Fresh Properties ◽  
Bleeding Rate ◽  
Water Film Thickness

In this paper, the effect of a newly developed superfine basalt powder (SB) on the fresh and mechanical properties of cement paste was studied. The concept of water film thickness (WFT) was cited to explain the influence of SB on fresh and mechanical properties and related mathematical model formulas were established. In addition, the relationship between the fresh properties and mechanical properties of paste was also explored. The results indicated that SB can improve the segregation resistance and cohesiveness. The maximum improvement rate relative to the control cement paste was 75.4% and 50.4%, respectively. The 5% SB and 10% SB reduced the fluidity in the range of 4.1–68.7% but increased the early and late compressive strength in the range of 1.2–25.7% compared to control cement paste under different water/cementitious materials (W/CM) ratios. However, the influence of 20% SB on fluidity and compressive strength was opposite to the above behavior, and the increase rate and decrease rate were 1.8–11.8% and 1.1–13.9% respectively. The WFT was the most important factor that determined the compressive strength, rheological parameters, and flow parameters of paste containing SB, while the substitute content of SB and WFT together determined the bleeding rate and cohesiveness. Among them, the correlation between bleeding rate and WFT increased with time. The empirical mathematical models between WFT, fresh properties, and compressive strength were established and verified by other mineral admixtures, which were successfully extended and applied to the entire field of cement-based materials

Effects and threshold of water film thickness on multi-mineral cement paste

2020 ◽  
Vol 112 ◽  
pp. 103677 ◽  
Author(s):  
Hengrui Liu ◽  
Xiao Sun ◽  
Hui Du ◽  
Hao Lu ◽  
Yuanshan Ma ◽  
...  
Keyword(s):  
Film Thickness ◽  
Cement Paste ◽  
Water Film ◽  
Water Film Thickness

Influences of fiber length and water film thickness on fresh properties of basalt fiber-reinforced mortar

2021 ◽  
Vol 22 (5) ◽  
pp. 344-356
Author(s):  
Leo Gu Li ◽  
Yi Ouyang ◽  
Pui-Lam Ng ◽  
Kai-long Zeng ◽  
Albert Kwok Hung Kwan
Keyword(s):  
Film Thickness ◽  
Fiber Length ◽  
Basalt Fiber ◽  
Water Film ◽  
Fiber Reinforced ◽  
Fresh Properties ◽  
Water Film Thickness

Seawater cement paste: Effects of seawater and roles of water film thickness and superplasticizer dosage

2019 ◽  
Vol 229 ◽  
pp. 116862 ◽  
Author(s):  
L.G. Li ◽  
X.Q. Chen ◽  
S.H. Chu ◽  
Y. Ouyang ◽  
A.K.H. Kwan
Keyword(s):  
Film Thickness ◽  
Cement Paste ◽  
Water Film ◽  
Water Film Thickness

Roles of water film thickness and polypropylene fibre content in fresh properties of mortar

2017 ◽  
Vol 29 (2) ◽  
pp. 71-80 ◽  
Author(s):  
Leo Gu Li ◽  
Jiang Zhu ◽  
Zhenwei Zhao ◽  
Albert Kwok Hung Kwan
Keyword(s):  
Film Thickness ◽  
Water Film ◽  
Polypropylene Fibre ◽  
Fibre Content ◽  
Fresh Properties ◽  
Water Film Thickness

Influence of Ground Slag on the Rheology of Mortar

2013 ◽  
Vol 438-439 ◽  
pp. 67-71
Author(s):  
Qian Qian Zhang ◽  
Jian Zhong Liu ◽  
Jia Ping Liu
Keyword(s):  
Film Thickness ◽  
Specific Surface ◽  
Yield Stress ◽  
Surface Area ◽  
Specific Surface Area ◽  
Water Film ◽  
Plastic Viscosity ◽  
Rheological Parameters ◽  
Water Film Thickness ◽  
Binder Ratio

The effects of ground slag with different specific surface area on the rheology of mortar at water-binder ratio of 0.25, 0.28 and 0.30 were investigated, and the combined effects of packing density and solid surface area on the rheology of mortar were evaluated in terms of the water film thickness. The results show that with the increasing of specific surface area of slag (220 m2/kg-784 m2/kg), plastic viscosity and yield stress decrease. The correlations of yield stress and plastic viscosity to the water film thickness are basically linear with high correlation R2 values. The action of the ground slag on the rheology of mortar can be characterized by water film thickness, and with the increasing of water film thickness the rheological parameters decrease.

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