Combined Interaction of PCE Chains Lengths, C3a and Water Content in Cementitious Systems

Kobya, Veysel; Karakuzu, Kemal; Mardani‐Aghabaglou, Ali; Felekoğlu, Burak; Ramyar, Kambiz

doi:10.2139/ssrn.4272697

Cited by 1 publication

(3 citation statements)

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“…Previous studies have similarly observed that aminebased GAs reduce fluidity in cement paste and have an adverse impact on rheological properties. 21,56 Therefore, the explanations provided earlier regarding the detrimental influence of these GAs on rheological properties remain applicable even with the modified PCE.…”

Section: Rheological Propertiesmentioning

confidence: 99%

“…52 PCE exhibits adsorption on the ettringite surface 3 to 10 times higher than on C-S-H. 53 This dispersion effect of PCE may be diminished when it intervenes within the layered structure of ettringite, which is a hydration product of C 3 A. 54,55 Here, it is thought that ettringite, which occurs more rapidly in GA1, GA2, and GA4 due to the presence of TEA and DEIPA, causes PCE-cement incompatibility. Furthermore, according to Perez et al, 15 TIPA was found to remain in the interstitial paste solution rather than being adsorbed onto the cement surface like TEA.…”

Section: Rheological Propertiesmentioning

confidence: 99%

“…9,10 It is known that cement admixture incompatibility negatively affects both fresh and hardened state properties of concrete mixtures. 3,11,12 The decrease in the surface energy of cement particles produced by the use of GA changes the amount of polycarboxylate ether (PCE)-based plasticizer that can be adsorbed on the particle. On the other hand, the presence of adsorbed GA on the particle surface may prevent water from reaching the particle during hydration.…”

Section: Introductionmentioning

confidence: 99%

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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

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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.

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Section: Rheological Propertiesmentioning

confidence: 99%