| Development of Long-Life Rubber Hose for Grout Pump |
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| DOI： |
| Key Words: extrusion type grout pump；long service life；rubber hose |
| Author Name | Affiliation | | ZHANG Hongsheng | Shenyang Xinfeiyu Rubber Products Co.，Ltd | | LIN Fengwen | Shenyang Xinfeiyu Rubber Products Co.，Ltd | | ZHANG Hongguo | Shenyang Xinfeiyu Rubber Products Co.，Ltd |
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| Abstract: |
| The formulation design，structural design and production process of long-life rubber hose for extrusion type grout pump were introduced.The rubber hose consisted of three layers：inner layer，reinforcement layer and cover layer.Four layers of polyester cord fabric were applied in the reinforcement layer and NR/BR blend was used as rubber material.The service life of the rubber hose exceeded 500 h. |
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