Study on Synthesis and Performance of Slump Retention Polycarboxylate
Due to long time transportation in a hot weather, the slump los ... 54.39 26.80 6.89 4.13 3.95 1.50 0. ... Research status and acting mechanism of slump retention type polycarboxylate plasticizer
Synthesis and Properties of a Polycarboxylate Superplasticizer with a
The dispersing performance and slump retention ability of all synthesized polymers were investigated via mini-slump tests and compared with the results obtained for a conventional comb-shaped PCE. Isothermal heat flow calorimetry as well as adsorption and zeta potential measurements were performed to elucidate the working mechanism of the novel hyperbranched superplasticizer.
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parameters such as acid-to-ether ratio, the problem of rapid slump loss of polycarboxylate superplasticizer in fresh concrete is solved, and the slump retention performance of polycarboxylate superplasticizer is improved. 2. Experiment 2.1. Materials TPEG-2400 (isopentenol polyoxyethylene ether with molecular weights of 2400, industrial grade),
Polycarboxylate Superplasticizer (PCE) For Concrete - Kingsun Chemicals
It contains polycarboxylate ether polymers and is specially formulated for ready-mix concrete where slump retention, high strength and durability are required in hot climates. It is chloride-free, meets SS EN 934, Set retarding/high range water reducing/superplasticizing admixtures, and ASTM C 494 requirements for Type F & G.
Research and application of polycarboxylate water reducer
50.23 5.36 Light . y. ... The slump retention performance affects the cons truction time and state ... Among the many super plasticizer, polycarboxylate super plasticizer because of its high water
- Does polycarboxylate superplasticizer have good dispersing performance?
- And the slump retention mechanism was analyzed. The results show that the polycarboxylate superplaticizer with hydroxyethyl group prepared in this study has good dispersing performance and high slump retention capability for concrete. Test results of concretes with different slump-retaining polycarboxylate superplasticizers.
- What is the optimum polymerization condition for a polycarboxylate superplasticizer?
- The results showed that under the optimum polymerization conditions of the slowly-released polycarboxylate superplasticizer with high slump retention, the dosage of initiator, chain transfer agent and acrylamide was 0.3%, 0.25% and 0.9% based on the mass of the macromonomer, respectively.
- What is a slump retaining polycarboxylate superplasticizer?
- Two kinds of slump-retaining polycarboxylate superplasticizer with different molecular structures were synthesized via maleic anhydride (MAH), polyethylene glycol monoallyl ether (APEG) and hydroxyethyl acrylate (HEA)/ethyl acrylate (EA) according to molecular structure design principle.
- Can Polycarboxylate-ether-type superplasticizers improve the performance of cementitious systems?
- The objective of this study is to link the molecular structure of polycarboxylate-ether-type superplasticizers with the performance of cementitious systems in order to develop new products with enhanced properties, e.g. improved water reduction with a wide range of cements or a reduced retardation of cement hydration.
- Is slow-release polycarboxylate superplasticizer a free radical copolymer?
- Slow-release polycarboxylate superplasticizer was synthetic under room-temperature conditions, a free radical copolymerization reaction occurred under the action of a redox initiator, and the optimal preparation process and temperature effect were discussed in detail.
- What is the adsorption capacity of polycarboxylate superplasticizer?
- Adsorption curve of the admixtures on cement particles. adsorption capacity of cement to superplasticizer is gradually increasing. The adsorption capacity of polycarboxylate superplasticizer PC-1 is bette r than PC-2. This is consistent with the ζ-potential capability than PC-2.
