The waterproofing membrane is required to have certain mechanical strength, elongation, tear resistance and flexibility, be able to resist water infiltration and penetration, and have certain resistance to weather, acid and alkali, and microbial corrosion. Tire reclaimed rubber is made from waste tires through physical and chemical processes, which has the characteristics of elasticity, wear resistance, aging resistance, low price, easy processing, and is widely used in various waterproof membranes.
1. The advantages of using tire reclaimed rubber in the waterproofing membrane
(1) Reduce the production cost of waterproofing membrane: Compared with natural rubber and synthetic rubber, the price of tire reclaimed rubber is much lower, and it can effectively reduce the cost of raw materials in the production of waterproofing membrane. Tire reclaimed rubber can be used alone or in combination with styrene-butadiene rubber, neoprene, etc. to produce vulcanized waterproofing membranes; For non-vulcanized waterproofing membranes, tire reclaimed rubber is used instead of synthetic rubber and asphalt blending to further reduce the cost of raw materials.
(2) Improve the wear resistance of the waterproofing membrane: the wear resistance of tire reclaimed rubber is good, which can improve the wear resistance of the waterproofing membrane and prolong its service life.
(3) Improve the aging resistance of the waterproofing membrane: The rubber components contained in the reclaimed rubber can effectively resist ultraviolet rays and oxidation, and enhance the aging resistance of the waterproofing membrane.
(4) Improve the processing technology of waterproofing membrane: the use of tire reclaimed rubber in the processing of waterproofing membrane can improve the stability of the finished product, adjust the viscosity and fluidity of the waterproofing membrane, improve production efficiency, make it easier to process and form, and reduce the scrap rate.
2. The application range of tire reclaimed rubber in waterproofing membrane
(1) Roof waterproofing: Tire reclaimed rubber can be used for roof waterproofing membrane to provide good waterproof and weather resistance.
(2) Basement waterproofing: In the basement waterproofing project, the use of membranes containing tire reclaimed rubber can improve the stability and durability of the waterproof layer.
(3) Water conservancy projects: In water conservancy projects such as reservoirs and dams, the waterproofing membrane reinforced by tire reclaimed rubber can provide additional protection.
3. Tire reclaimed rubber selection skills for waterproofing membranes
When using tire reclaimed rubber to produce waterproofing membrane, it is first necessary to select the appropriate tire reclaimed rubber to ensure that its performance meets the requirements of waterproofing membrane, and determine the optimal mixing ratio of tire reclaimed rubber through experiments to achieve the best balance among the performance and cost of waterproofing membrane.
Under normal circumstances, when the physical properties of the waterproofing membrane are high, it is recommended to use ultra-fine tire top reclaimed rubber, fine tire reclaimed rubber, etc., and the comprehensive performance of the waterproof membrane is better; Low-grade waterproofing membrane can directly use ordinary tire reclaimed rubber to reduce more costs. Tire reclaimed rubber can also be used in combination with sole reclaimed rubber to prepare a waterproof material with lower cost by blending asphalt.
4. Key points of waterproofing membrane formula design for tire reclaimed rubber production
When using tire reclaimed rubber as the main raw material to produce waterproofing membranes, the traditional sulfur vulcanization system can be selected, combined with thiazole accelerators, etc., to improve the vulcanization rate and the physical properties of vulcanized rubber; Zinc oxide and stearic acid E4LYY117 were added to activate the vulcanization system, improve the vulcanization efficiency and cross-linking density of vulcanized rubber, and enhance the aging resistance. Semi-reinforcing carbon black or high wear-resistant carbon black is selected as the reinforcing agent to improve the wear resistance, physical and mechanical properties and aging resistance of the reclaimed rubber waterproofing membrane; The filler can choose light calcium, talcum powder, etc. to increase the volume of the rubber compound. Choose softeners such as paraffin oil and naphthenic oil to improve the flexibility of the compound.
The use of tire reclaimed rubber to produce rubber waterproofing membrane, strict control of the quality of reclaimed rubber, and continuous optimization of waterproofing membrane formula can not only reduce costs, improve the comprehensive performance of waterproofing membrane, but also promote the recycling of waste rubber resources, help reduce the pollution of waste tires to the environment, and meet the requirements of sustainable development and environmental protection.
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