Effect of some chemical admixtures on the physico-chemical and rheological properties of oil well cement pastes

Habib, A.O.; Aiad, Ismail; Youssef, Teraze A.; Mohsen, Alaa

doi:10.1016/j.conbuildmat.2016.05.044

Cited by 65 publications

(8 citation statements)

References 11 publications

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“…In view of the low grinding ability of triethanolamine in cement fine-grinding stage and the disadvantage on the late strength growth of cement, it is studied that the triethanolamine modified by carboxylic acid has a better effect on the grinding and dispersing, and the strength of cement at early and late stage has a significant growth [1,11,12]. e molecular structure and dosages of the admixtures play an important role in the hydration of cement, such as shorting the hydration time, reducing the hydration heat, and improving the mechanical strength [13][14][15][16]. However, it is not clear at present that the increase in the performance of the admixture is caused by changes in the molecular structure or by the action of the newly introduced ester functional groups after modification.…”

Section: Introductionmentioning

confidence: 99%

Influence of Organic Esters on Portland Cement Hydration and Hardening

Zheng

Wang

et al. 2018

Advances in Materials Science and Engineering

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This paper investigated the effect of organic compounds with ester groups on the hydration and hardening of cement. The effects of five kinds of organic compounds with ester groups (ethyl acetate, dimethyl oxalate, glyceryl triacetate, trimethyl phosphate, and triethanolamine borate) on hydration heat, hydration degree, setting time, mechanical properties, microstructure, and pore structure of hardened cement slurry were studied. The test results showed that esters can make the end time of cement hydration induction longer and delay the occurrence of the second exothermic peak. Also, the effect of five kinds of esters on the hydration and hardening of cement was basically followed by TG> TB> DMO> EAC> TMP. In terms of molecular structure, for organic compounds containing only ester groups, the higher the number of ester groups, the greater the effect on the hydration of cement. The introduction of other functional groups (such as phosphate or borate) will influence the effect of the esters.

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Section: Introductionmentioning

confidence: 99%

Influence of Organic Esters on Portland Cement Hydration and Hardening

Zheng

Wang

et al. 2018

Advances in Materials Science and Engineering

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“…According to the rheological curves, both the shear stress and apparent viscosity of cement pastes in the presence of PCE decreased with the addition of the cationic polymer KN. On the other hand, all of the cement pastes showed an increase of shear stress and apparent viscosity after standing for 1 and 3 h, owing to the increasing formation of floccules in the cement-suspending liquids resulting from the interaction between cement grains and water molecules. − The cement pastes containing 0.07 and 0.1% bwoc of PCE in the absence of KN showed typical shear-thinning features. For cement pastes containing 0.13% bwoc of PCE in the absence of KN, however, slight shear-thickening behavior was observed.…”

Section: Resultsmentioning

confidence: 97%

Effect of a Cationic Polymer on the Rheology of Cement Pastes Containing Na-Bentonite

Wen

Feng²,

Zheng

2023

Langmuir

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This paper studies how a cationic polymer affects the rheological properties of cement pastes containing Nabentonite in the presence of a polycarboxylate superplasticizer (PCE), and the fluidity was also investigated. The Herschel− Bulkley model was applied to fit the rheological data of cement pastes at the beginning and after 1 and 3 h. The results show that the cement pastes exhibit a significant increase in fluidity and turn to be a shear-thickening fluid with the addition of the cationic polymer KN, as indicated by the pseudoplastic index n. The yield stress and plastic viscosity of cement pastes containing Nabentonite obviously decrease with the addition of KN. Statistical analysis was performed to evaluate the impact of KN and PCE on the rheological properties. PCE exhibits a significant influence on both yield stress and plastic viscosity, while KN also exerts an obvious effect on the yield stress for cement pastes containing minor amounts of PCE. The equations for yield stress and plastic viscosity are obtained, which will allow us to predict the yield stress and plastic viscosity of cement pastes containing various contents of PCE and KN.

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“…Łaźniewska-Piekarczyk 13 demonstrated that the type of chemical admixtures and their interaction significantly influenced the properties of very high-performance self-compacting concrete. Sahmaran et al, 14 AzariJafari et al, 15 Lenart, 16 Bizinotto et al, 17 and Habib et al 18 studied the effects of chemical admixtures on the properties of cement mortar. Another study of Habib et al 19 pointed out chemical admixtures enhanced the hardening and plastic properties of the cement pastes.…”

Section: Introductionmentioning

confidence: 99%

Effect of chemical admixtures on the properties of grouting materials with high-volume mineral materials

2019

Advanced Composites Letters

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Based on the preparation of grouting materials with high-volume mineral admixtures, the effects of chemical admixtures including early-strength components and retarding components on the grouts with volume mineral admixtures were investigated. The results show that early-strength components have little effect on the grouts with high-volume mineral admixtures. Retarding component sodium gluconate does not play a great role for the grouts with high-volume mineral admixtures. However, the incorporation of borax and sodium tripolyphosphate can greatly improve the properties of the grouts, mainly due to their composite effect. The appropriate compound content is 0.4 wt% borax and 0–0.2 wt% sodium tripolyphosphate of cementitious materials. When 0.4 wt% borax and 0.2 wt% sodium tripolyphosphate were added to the grouts with volume mineral admixtures, initial fluidity and 30-min fluidity are 340 mm, and 1-, 3-, and 28-day compressive strength are, respectively, 41.6, 57.1, and 81.5 MPa. These values far exceed the standard requirements. It also shows that early-strength components and sodium gluconate can be neglected when high-volume mineral admixtures are added to the grouts.

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Effect of some chemical admixtures on the physico-chemical and rheological properties of oil well cement pastes

Cited by 65 publications

References 11 publications

Influence of Organic Esters on Portland Cement Hydration and Hardening

Influence of Organic Esters on Portland Cement Hydration and Hardening

Effect of a Cationic Polymer on the Rheology of Cement Pastes Containing Na-Bentonite

Effect of chemical admixtures on the properties of grouting materials with high-volume mineral materials

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