Apa itu superplasticizer? Secara sederhana, superplasticizer adalah bahan tambahan dalam campuran beton yang memiliki kemampuan untuk mengubah sifat-sifat fisik dan mekanik beton.
Retarding admixtures slow down the hydration of cement, lengthening established time. Retarders are beneficially used in very hot climatic conditions in an effort to overcome accelerating consequences of higher temperatures and large masses of concrete on concrete location time. Due to the fact most retarders also act as water reducers, They are really frequently termed water-reducing retarders. As per chemical admixture classification by ASTM-ASTM C 494, type B is actually a retarding admixture, although type D is both of those retarding and water reducing, resulting in concrete with increased compressive toughness because of the decrease water-cement ratio. Retarding admixtures is made of each natural and inorganic agents.
These are highly economical at reducing water content material and considerably improve the workability of concrete.
Water reducers are additional to the concrete combination, mortar or grout to boost the flowability without raising the water content.
Plasticizers make issues additional flexible because they have polymer molecules within them. When these molecules are added to concrete, they stick to the surface of the grains and make ionic groups that radiate outward.
特别适用于配制混凝土施工时间长，对混凝土坍落度保持要求高的工程，如核电工程。
Superplasticizers are "high-range" water reducers. Superplasticizers are used when positioning: Slim sections or all over tightly spaced reinforcing steel
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Plasticizers are routinely used in conjunction with pozzolanic ash although creating concrete. This mix proportioning method is often utilized when producing high-strength or fiber-reinforced concrete.
Air-entraining agents entrain modest air bubbles within the concrete. The foremost benefit of This is often Improved longevity in freeze-thaw cycles, Specifically relevant in cold climates. Although some toughness loss commonly accompanies improved air in concrete, it frequently may be prevail over by reducing the water-cement ratio via enhanced workability (as a result of air-entraining agent alone) or through the utilization of other ideal admixtures.
Meskipun telah dijelaskan secara ringkas sebelumnya, namun untuk pemahaman yang lebih mendalam, silakan simak penjelasan berikut:
During the realm of concrete, plasticizers are groundbreaking mainly because they offer a amount of advantages that make improvements to the material’s workability and performance.
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Sodium gluconate is uncovered being more effective basically and is much more managed than lignosulphonate when it truly is used as being a retarding agent. Disorders, the place the superplasticizers and also the retarding agents ought to be used simultaneously, potential customers the producer to determine the ideal dosage when it comes to cost and also the compressive power for short-term. Any delay while in the compressive toughness that is usually to be gained within an individual working day will delay the perform. Using superplasticizer along with the retarding agent is a tough approach. The climatic components also should be viewed as while optimizing their volume, as the cement reactivity is enormously impacted with the temperature of your concrete. Share This informative article Facebook