The construction technology and cost analysis of epoxy resin slurry repair crack technology The improvement of engineering structure durability has always been a major subject of great concern and continuous exploration and solution in China's engineering community. Due to the inevitable gaps or voids in the reinforced concrete, the internal steel bars will be corroded under the corrosive medium such as salt water, especially in coastal ports, sea-crossing bridges and airports that need to sprinkle salt water and snow. More serious facilities such as highways. The scale of iron oxide produced on the surface of the steel bar is tens of times larger than that caused by the rust, which causes the concrete to crack and the protective layer to peel off. The steel bar is more exposed to the corrosive medium and the corrosion rate of the steel bar is accelerated. Therefore, in recent years, countries have paid more and more attention to the evaluation, identification and maintenance of existing concrete and reinforced concrete structures. Most buildings and structures have been damaged to varying degrees after years of use and require maintenance and repair. Epoxy adhesive made of epoxy resin has superior performance and many modification methods, and has developed rapidly in recent years. It is mostly used in the bonding and repairing of concrete members, bridge engineering, air runway, road repair, concrete structure crack reinforcement or anti-seepage and grouting. The most widely used is the bonding and repair of concrete components. The process is to close the cracks or pores of the bridge structure to the outside, leaving the slurry holes and vent holes, and then formulating a certain material into a lower viscosity epoxy resin slurry, and using a compression pump to press the ring at a certain pressure. The oxy-resin slurry is hydraulically stored in the crack to solidify the diffusion gel to achieve the purpose of strengthening or restoring the original structural strength. Studies have shown that the bond-bonding strength of epoxy-coated steel bars is reduced by about 10% under normal conditions and by no more than 20% under the most unfavorable conditions. Therefore, in order to ensure the bond anchoring strength between the coated steel bar and the concrete, it is necessary to increase the anchoring length of the coated steel bar by a certain value, and increasing the anchoring length is bound to increase the cost of the raw material. In general, the reserved anchor length is 25% higher than the anchor length of ordinary steel bars. The construction cost and labor cost of epoxy resin coated steel bars account for about 25% of the total project cost. The one-time investment is very large, but epoxy resin is used as the bonding material because it is waterproof, moisture-proof and corrosion-resistant. Excellent performance such as cold resistance, heat resistance, impact resistance and vibration. It is widely used in bridge maintenance, prolonging service life and ensuring safe operation. Its excellent performance will bring broad application prospects. Http://news.chinawj.com.cn Editor: (Hardware Business Network Information Center) http://news.chinawj.com.cn

This classification including Zinc Coated Rectangular Hollow Section, usually they are used for construction purpose, also some customer use them for car , billboard, stents, fence etc.

Jinan Xin Jiyuan is specialized in ERW and Seamless square&rectangular tube/pipe, hollow section structure pipe, and galvanized pipe in China. Annual output reaches 1.5 million tons. We have 2 production lines, could producte square pipe from 20*20*1mm to 600*600*35mm, rectangular pipe from 20*30*1.2mm to 600*800*35mm. Xin Jiyuan can manufacture square rectangular pipes as per the standards of ASTM A500, JIS G3466, EN10219, EN10210,DIN2240, BS1387, AS1163. Steel Grade: A500 GR.A/B/C/D, SS400, STKR490, S355JR, S275JO, S275J2, S355J0, S355J2, C350, C350 L0 ect.

We have three heat treatment furnace, two furnace of 100 mt, and one furnace of 300mt, that means we could finish 500mt goods at the same time.

Zinc Coated Rectangular Hollow Section

Zinc Coated Rectangular Hollow Section, Zinc Coated Hollow Section,Zinc Coated Carbon Hollow Section,Quality Rectangular Hollow Section

JINAN XIN JIYUAN SPECIAL SECTION TUBE CO., LTD. , https://www.squarepipes.com