scholarly journals Roles of Packing Density and Water Film Thickness in Rheology and Strength of Cement Paste

2012 ◽  
Vol 10 (10) ◽  
pp. 332-344 ◽  
Author(s):  
Albert K. H. Kwan ◽  
Jia Jian Chen
Keyword(s):  
Film Thickness ◽  
Cement Paste ◽  
Packing Density ◽  
Water Film ◽  
Water Film Thickness

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

Effects of packing density and water film thickness on fresh and hardened properties of ternary cement pastes

2020 ◽  
Vol 32 (10) ◽  
pp. 444-455 ◽  
Author(s):  
Guillermina Marchetti ◽  
Edgardo Fabián Irassar ◽  
Viviana Fátima Rahhal
Keyword(s):  
Film Thickness ◽  
Packing Density ◽  
Water Film ◽  
Cement Pastes ◽  
Water Film Thickness ◽  
Hardened Properties

Effects of packing density and water film thickness on the fluidity behaviour of cemented paste backfill

2020 ◽  
Vol 359 ◽  
pp. 27-35 ◽  
Author(s):  
Jingping Qiu ◽  
Zhenbang Guo ◽  
Lei Yang ◽  
Haiqiang Jiang ◽  
Yingliang Zhao
Keyword(s):  
Film Thickness ◽  
Packing Density ◽  
Water Film ◽  
Cemented Paste Backfill ◽  
Water Film Thickness ◽  
Paste Backfill

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

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

scholarly journals Influence of Sand-Cement Ratio and Polycarboxylate Superplasticizer on the Basic Properties of Mortar Based on Water Film Thickness

Materials ◽  
2021 ◽  
Vol 14 (17) ◽  
pp. 4850
Author(s):  
Zhao Zhang ◽  
Qingge Feng ◽  
Weiwei Zhu ◽  
Xianhao Lin ◽  
Kao Chen ◽  
...  
Keyword(s):  
Film Thickness ◽  
Packing Density ◽  
Water Film ◽  
Cement Ratio ◽  
Water Film Thickness ◽  
Basic Properties ◽  
Polycarboxylate Superplasticizer ◽  
Key Factor

Previous studies demonstrated that water film thickness (WFT) is a key factor that affects the fluidity of mortar. Changes in the sand-cement (S/C) ratio and polycarboxylate superplasticizer (PCE) dosage will affect the WFT. In this study, several mortar samples with different S/C ratios and different PCE dosages were prepared, and the basic properties of the mortar were measured. The results show that as the S/C ratio increases, the packing density of the mortar will decrease, the WFT will decrease, and the cohesiveness will increase, resulting in a decrease in the flow spread and strength of the mortar. When the PCE dosage is increased, the packing density of the mortar will increase, the WFT will increase, and the cohesiveness will decrease, which increases the flow spread of the mortar. When the water-cement (W/C) ratio is low, the S/C ratio has a significant effect on the strength, and the strength will increase with the increasing of the PCE dosage. When the W/C ratio is high, the strength of the mortar will be reduced once the PCE dosage exceeds the saturation value. In the case of different S/C ratios or different PCE dosages, the WFT can be used as a measure of mortar cohesiveness and flow spread.

Sign in / Sign up

Export Citation Format

Share Document