Pumping agent in the construction of the application and use

First, the product description:
This product conforms to the concrete admixture national standard GB8076-97 and building materials industry standard JC473-2001, non-toxic, odorless, non-flammable, non-corrosive reinforcing steel.
The main components of pumping agent is β-naphthalenesulfonate formaldehyde condensate and polybasic acid condensate, and compound to plastic, air bleed, retarding, pump and other components; with water, enhanced, plasticized, Plastic, slow-setting characteristics. Its chloride content and sulfate content is minimal, no corrosion of the steel harm, no adverse effects on concrete shrinkage, and good adaptability to Portland cement. According to the strength level of concrete required, technical requirements and construction conditions can be divided into ordinary type, early strength and high efficiency type three.

Second, the main performance:
1, the product can significantly improve the fluidity and water retention of concrete, the concrete mixture has a smaller frictional resistance, the basic separation does not produce the phenomenon of segregation, heat of hydration is low, in a long time to maintain a good pump Send performance. Dosage range: 1.5 ~ 3.5% (commonly used 2.0 ~ 2.5%) Recommended users should be based on raw materials and construction conditions, through the test to determine the best dosage.
2, efficient pumping agent, has a very high rate of water reduction, slump loss is minimal, the basic elimination of bleeding segregation phenomenon, its wide range of applications, not only can be easily formulated C40 ~ C60 medium and high grade concrete, And C60 or even C80 shrink-free self-leveling high performance concrete can be used 42.5 ordinary cement preparation, which can only be achieved by adjusting the dosage.

Third, technical indicators

Main Specifications Test Project National Standard (First Class) Factory Specifications Model - saho-B
Dosage powder dosing% 1.5 2.0-2.5
Slump increase value cm ≥10 ≥14
Atmospheric pressure bleeding ratio% ≤ 90 ≤ 70
Gas content% ≤4.5 ≤3.0
Slump retention value cm 30min ≥15 ≥16
60min ≥12 ≥14
Compressive strength ratio% 3d ≥ 90 ≥125
7d ≥90 ≥120
28d ≥90 ≥110
28D Shrinkage ratio% ≤135 ≤135
Rust effect on the bar No rust on the bar without corrosion

Fourth, the scope of application:
This product is suitable for concrete, long-distance transportation or pumping, or pumping concrete projects with poor construction conditions. It can be widely used in high-grade concrete, mass concrete, high-density reinforced concrete, high-rise buildings, bridges and deep pits Tunnels and other concrete works.

Fifth, the use of methods and precautions:
1, The initial use should be based on the nature of the project, the purpose and site use of raw materials, construction conditions and other pre-trial, by comparing the selection of technical and economic performance and better price varieties, models and dosage.
2, according to the proportion of direct blending, mixed with concrete pouring agent to vibrate after compaction, not leakage, vibration, or vibration.
3, mixed with the agent can improve the plasticity of concrete admixture, thixotropy, the amount of water will be reduced accordingly, should control the water-cement ratio and slump, and to strengthen the early maintenance of concrete work, mixed with agents of concrete end Condensation should be promptly after watering conservation, to ensure adequate water on the concrete surface, conservation time of not less than 14 days, should strengthen the insulation during the cold season (such as covering straw bags, films, etc.).

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