Effect of the polycarboxylate based water reducing admixture structure on self-compacting concrete properties: Main chain length

Özen, Süleyman; Altun, Muhammet Gökhan; Mardani‐Aghabaglou, Ali

doi:10.1016/j.conbuildmat.2020.119360

Cited by 37 publications

(18 citation statements)

References 30 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…On the other hand, the amount of adsorption significantly increased with decreasing from 21 to 17 k of the main chain length. The effect of the main chain length and side chain length of PCE‐ether‐based high range WRA on properties of self‐compacting concrete were investigated in the previous studies of the authors 11,12 . Studies gave similar results in terms of adsorption behavior.…”

Section: Resultsmentioning

confidence: 92%

“…Studies gave similar results in terms of adsorption behavior. In the study of Özen et al, 11 it was observed that the adsorption amount increased with the increase of main chain length. On the other hand, the adsorption amount decreased with the increase of side chain length was determined in the paper studied by Altun et al 12 Results of this study show that side chain length effect on the adsorption is more prominent than the effect of main chain length.…”

Section: Resultsmentioning

confidence: 93%

“…The amount of PCE adsorption was determined by using a total organic carbon (TOC) analyzer as similar to studies investigated by Özen et al 11 and Altun et al 12 Marsh‐funnel and mini‐slump tests were carried out following the procedures in Aïtcin 10 and Kantro, 13 respectively. The time‐dependent spread values of the mortar mixtures were determined in accordance with ASTM C1437 at every 15 min for 1 hr.…”

Section: Experimental Studymentioning

confidence: 99%

See 2 more Smart Citations

Effect of main and side chain length change of polycarboxylate‐ether‐based water‐reducing admixtures on the fresh state and mechanical properties of cementitious systems

Özen

Altun

Mardani‐Aghabaglou

et al. 2020

Structural Concrete

Self Cite

View full text Add to dashboard Cite

In this study, the effect of both main and side chain length changes of the admixtures on some properties of cementitious systems were investigated. Three different polycarboxylate‐ether‐based water‐reducing admixtures (WRA) having constant molecular weights and different main and side chain lengths were synthesized. Single type of raw material and carboxylate functional group were used in all WRAs. The molecular weights, free nonionic contents, and anionic/nonionic ratios of the admixtures were kept constant. Test results showed that degree of fluidity was observed in cement paste and mortar mixtures in case the admixture main and side chain length is more or less than a critical value. This negative effect is thought to be due to the weakening of the adsorption ability by the chain length change of the admixtures, the being tendency of polymers to intertwine and the adsorbing of admixture on several cement particles simultaneous. Admixtures having excessive long or short main chain and side chain improved the time‐dependent slump‐flow retention of the mortar mixtures. The admixtures with short main and side chains had insufficient adsorption ability and the admixture with excessive long main and side chains had the interlacing risk of polymers. In both cases, time‐dependent behavior improved because the amount of free admixture in solution increased. The change in the chain lengths of the WRAs affected the 1‐day compressive strength of the mortar mixtures.

show abstract

Section: Resultsmentioning

confidence: 92%

Section: Resultsmentioning

confidence: 93%

Section: Experimental Studymentioning

confidence: 99%

See 1 more Smart Citation

Effect of main and side chain length change of polycarboxylate‐ether‐based water‐reducing admixtures on the fresh state and mechanical properties of cementitious systems

Özen

Altun

Mardani‐Aghabaglou

et al. 2020

Structural Concrete

Self Cite

View full text Add to dashboard Cite

show abstract

“…When the thickness of the bubble liquid film was reduced to a certain extent, the liquid film drainage was dominated by Plateau drainage [ 49 ]. When thinning reached a certain extent, the bubble burst [ 1 ].…”

Section: Research Progress In the Mechanism Of The Whole Bubble Devel...mentioning

confidence: 99%

“…PCE with a special structure can be used as an air-entraining water reducer. Factors such as molecular mass, main chain density, and side-chain length significantly affect its air-entraining properties and the structure characteristics of the generated bubbles [ 1 ]. At the same time, air-entraining agents of different types create different effects on the characteristics of concrete bubbles, resulting in different concrete properties [ 2 ].…”

Section: Introductionmentioning

confidence: 99%

Bubble Evolution under the Action of Polycarboxylate and Air-Entraining Agent and Its Effects on Concrete Properties—A Review

et al. 2022

View full text Add to dashboard Cite

In order to improve the performance of concrete, it is of great significance to have a better understanding the mechanism and main influencing factors of concrete bubble evolution under the action of polycarboxylate and air-entraining agents. In the present review, with respect to the generation, growth, stability, and rupture of concrete bubbles under the action of polycarboxylate and air-entraining agents, this paper discusses the influence of bubble characteristics on concrete performance and studies bubble regulation by air-entraining agents and polycarboxylate (PCE) superplasticizer. The results show that the acid-to-ether ratio, sulfonic acid group, ester group, and the type of air entraining agent of the polycarboxylate acid structure have a significant impact on the bubbles. The bubble size, specific area, spacing factor, and bubble content have a significant impact on the rheological properties and related mechanical properties of fresh concrete and also affect the appearance quality of concrete. The problems with the experimental methods and theoretical models of concrete bubble research were analyzed, and future research ideas were put forward.

show abstract

Evaluation of fresh state, rheological properties, and compressive strength performance of cementitious system with grinding aids

Kaya,

Kobya,

Mardani

2024

J of Applied Polymer Sci

Self Cite

View full text Add to dashboard Cite

Grinding aids (GA) affect the fresh and hardened state properties of cement systems in addition to the economic and ecological advantages they provide. Nevertheless, there is not enough information in the literature regarding the effect of GA utilization on the rheological properties of cementitious systems. In this study, the effect of different types of GA utilization on the grinding efficiency, setting time, and physical properties of cement and rheological properties of cement paste was investigated. Besides, adsorption of the water‐reducing admixture (polycarboxylate ether [PCE]) to the cement containing GA was investigated by total organic carbon analysis. According to the results, regardless of the type of GA, while the grinding efficiency was positively affected by GA utilization in cement, the adsorption degree of PCE, some fresh and rheological properties of the mixtures were negatively affected. With the use of GA, an increase was observed in the early age compressive strength of mortar mixtures. Consequently, the properties of cementitious systems containing GA should be taken into consideration to assess GA performance in addition to the grinding efficiency.

show abstract

Effect of the polycarboxylate based water reducing admixture structure on self-compacting concrete properties: Main chain length

Cited by 37 publications

References 30 publications

Effect of main and side chain length change of polycarboxylate‐ether‐based water‐reducing admixtures on the fresh state and mechanical properties of cementitious systems

Effect of main and side chain length change of polycarboxylate‐ether‐based water‐reducing admixtures on the fresh state and mechanical properties of cementitious systems

Bubble Evolution under the Action of Polycarboxylate and Air-Entraining Agent and Its Effects on Concrete Properties—A Review

Evaluation of fresh state, rheological properties, and compressive strength performance of cementitious system with grinding aids

Contact Info

Product

Resources

About