1. Product Introduction
UEA-H high-efficiency concrete expansion agent is a major patented achievement of the China Academy of Building Materials Science. (Patent number: 85107015). This product combines the essence of expansion agents from China, Japan and the United States, and is currently one of the best crack-resistant and anti-seepage concretes in China. Its technical performance complies with JC476-98 standard.
2. Main properties
1. UEA-H is a calcium sulfoaluminate concrete expansion agent. It is mixed with 8-10% of the five major cements and can be mixed to compensate for shrinkage. Concrete, prevent or greatly reduce concrete cracking, improve compactness and impermeability, realize structural self-waterproofing, extend or cancel expansion joints, simplify construction technology, shorten construction period; expand temperature control range, control temperature difference cracks, and have good economic and technical benefits .
2. UEA-H has low alkali content, no alkali aggregate reaction, large expansion energy, fast expansion stability, high strength in the later period, and small dry shrinkage. It is a safe and durable product. of admixtures.
3. Scope of application:
UEA-H high-efficiency concrete expansion agent can be used for concrete projects and cement products that require resistance to cracking, anti-seepage, joints, and filling.
1. Underground buildings such as subways, underground parking lots, underground warehouses, tunnels, mines, civil air defense projects, basements, etc.
2. Build pools, swimming pools, water towers, storage tanks, large containers, granaries, and oil tanks.
3. Self-waterproof rigid roof, mortar anti-seepage layer, and mortar moisture-proof layer.
4. The cast iron pipes are lined with protective mortar.
5. Cement products, manufacturing self-stressed, prestressed and rigid-sheathed anti-stress concrete, water pipe concrete and reinforced concrete, drainage pipes, floor slabs, columns, beams and columns , waterproof roof panels, etc.
6. Important buildings that require good crack resistance and perfect appearance, such as sports stands, city sculptures, museums, hotels, etc.
7. Highway pavement, bridge concrete surface, and culverts.
8. Build high-strength, high-impermeability shafts and dam backfill trenches filled with concrete.
4. Precautions for use:
1. The mix design of UEA-H concrete is the same as that of ordinary concrete. But the minimum cement dosage should be >300kg/m3. Exceptions include large-volume concrete for hydraulic engineering and offshore engineering.
2. A dedicated person must be responsible for UEA-H weighing, and the UEA-H measuring device must be inspected at any time. In principle, UEA-H is put into the mixer together with other materials. Mixing time: When using a forced mixer, it will be extended by more than 30 seconds than ordinary concrete, and when using a self-falling mixer, it will be extended by more than 1 minute. The mixing time is required to achieve a uniform state before discharging.
3. The poured concrete should not be exposed to direct sunlight and should be covered with straw mats in time. After the concrete hardens, a dedicated person must be responsible for curing it, and the curing time should be no less than 14 days to keep the concrete in a moist state.
4. If honeycomb dog holes appear in the concrete after removing the formwork, the loose areas can be removed and then repaired with UEA-H-mixed mortar or pisolite concrete.
5. The expansion distance of UEA-H concrete can be extended to 60m; by adopting seamless design and construction technology, expansion joints can be eliminated.
V. Packaging
This product is packaged in a plastic bag lined with film, 40 kg/bag. </p
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