Low-cost synthesis of high-performance polycarboxylic ether
As a new type of high-performance water-reducing agent, polycarboxylate ether (PCE) has excellent properties such as small dosage and high water reduction rate. However, it is still necessary to develop a synthetic process to improve the performance of PCE at a low cost. In this paper, Co2+-, Ni2+- or Zn2+-catalyzed H2O2-NaHSO3 redox initiation system is designed as a new cost-effective
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amount of superplasticizer is usually increased to maintain the working performance of the concrete and make the concrete have good fluidity. However, the increase of the dosage of water-reducing agent can easily lead to the segregation and bleeding of concrete, and reduce the compressive strength of concrete.
HV6128 - Institute of Physics
common, this puts higher requirements on the performance of polycarboxylate superplasticizer[5-6]. At present, the water reducing agent on the market has early bleeding due to the high water-reducing rate, and the stagnation of the stagnation of the stagnation agent requires the
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A polycarboxylate ether-based Superplasticizer, Master Glenium 7500, made by Badische Anilino und Soda Fabrik (BASF), was used as the water reducing admixture in the preparation of the CPB. It is widely used in the backfill construction industries for the improvement of workability and/or flowability.
Use of Water Reducers, Retarders, and Superplasticizer
There are four types of superplasticizers: sulfonated melamine, sulfonated naphthalene, modified lignosulfonates and a combination of high dosages of water reducing and accelerating admixtures. Commonly used are melamine based and naphthalene based superplasticizers.
- What is polycarboxylate superplasticizer?
- The Polycarboxylate Superplasticizer can reduce the amount of cement, and the water reducing rate can reach more than 30%. This product can mainly improve the strength of mortar, which is defined as water reduction and reinforcement without affecting the workability of concrete.
- What are water reducers & retarders?
- Water reducers, retarders, and superplasticizers are admixtures for concrete, which are added in order to reduce the water content in a mixture or to slow the setting rate of the concrete while retaining the flowing properties of a concrete mixture.
- What is a high range water reducer admixture?
- Superplasticizers (High Range Water reducer) ASTM C494 Type F and Type G, High Range Water Reducer (HRWR) and retarding admixtures are used to reduce the amount of water by 12% to 30% while maintaining a certain level of consistency and workability (typically from 75 mm to 200 mm) and to increase workability for reduction in w/cm ratio.
- What are the different types of superplasticizers?
- There are four types of superplasticizers: sulfonated melamine, sulfonated naphthalene, modified lignosulfonates and a combination of high dosages of water reducing and accelerating admixtures. Commonly used are melamine based and naphthalene based superplasticizers.
- Is polycarboxylate superplasticizer soluble in water?
- The product is easily soluble in water, and has a good dispersing effect on many powder materials such as cement. The Polycarboxylate Superplasticizer can reduce the amount of cement, and the water reducing rate can reach more than 30%.
- Can superplasticizers produce high strength concrete?
- The use of superplasticizers may produce high strength concrete (compressive strength up to 22,000 psi). Superplasticizers can also be utilized in producing flowing concrete used in a heavy reinforced structure with inaccessible areas. Requirement for producing flowing concrete is defined in ASTM C 1017.
