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A platform for research: civil engineering, architecture and urbanism
Heat-insulation and heat-resistant shotcrete and preparation method thereof
The invention discloses heat-insulation and heat-resistant sprayed concrete and a preparation method thereof. The thermal insulation and heat resistance type sprayed concrete is composed of cement, modified silica mortar, modified thermal insulation ceramsite, fine aggregate, water, an additive, an accelerator and the like. According to the invention, the high-strength shale ceramsite subjected to surface modification by using hydrogel is introduced as a heat insulation filler, so that the dispersion stability of the lightweight aggregate in slurry is greatly improved, and the lightweight aggregate has relatively strong water absorption and slow release capability and a surface sealing function, and can play roles in pore heat insulation and water storage and release internal maintenance in a high-ground-temperature environment; the modified silicon mortar capable of effectively improving the high-temperature stability and compactness of a slurry hydration product is supplemented, so that the homogeneity of a mixture of the sprayed concrete, the heat insulation performance of a hardened body and the strength development and durability under the high-temperature condition are comprehensively improved, and the temperature of a tunnel cavity can be effectively improved; the service life of the sprayed concrete under a high-temperature condition is prolonged. The thermal-insulation heat-resistant shotcrete technology is clear in action mechanism, simple in production process, excellent in performance and suitable for large-scale production, and has important significance on high-quality construction of underground engineering such as tunnels and mines in a high-ground-temperature environment and a high-temperature water bursting environment.
本发明公开了一种隔热耐热型喷射混凝土及其制备方法。这种隔热耐热型喷射混凝土是由水泥、改性硅灰浆、改性隔热陶粒、细骨料、水、外加剂、速凝剂等组分组成。本发明中通过引入使用水凝胶进行表面改性的高强页岩陶粒作为隔热填料，大幅提升了轻质骨料在浆体中的分散稳定能力，并具有较强吸水缓释能力和表面封闭功能，可以在高地温环境中起到孔隙隔热和储水释水内养护作用，辅以可以有效提升浆体水化产物高温稳定性和密实程度的改性硅灰浆，全面提升了喷射混凝土的拌合物的匀质性及硬化体的隔热性能及高温条件下的强度发展和耐久性，可以有效改善隧道洞室温度，提升喷射混凝土在高温条件下的服役寿命。该隔热耐热型喷射混凝土技术作用机理清晰、生产工艺简单、性能优秀，适用于大规模生产，对于高地温环境及高温涌水环境的隧道，矿井等地下工程的高质量建设具有重要意义。
Heat-insulation and heat-resistant shotcrete and preparation method thereof
The invention discloses heat-insulation and heat-resistant sprayed concrete and a preparation method thereof. The thermal insulation and heat resistance type sprayed concrete is composed of cement, modified silica mortar, modified thermal insulation ceramsite, fine aggregate, water, an additive, an accelerator and the like. According to the invention, the high-strength shale ceramsite subjected to surface modification by using hydrogel is introduced as a heat insulation filler, so that the dispersion stability of the lightweight aggregate in slurry is greatly improved, and the lightweight aggregate has relatively strong water absorption and slow release capability and a surface sealing function, and can play roles in pore heat insulation and water storage and release internal maintenance in a high-ground-temperature environment; the modified silicon mortar capable of effectively improving the high-temperature stability and compactness of a slurry hydration product is supplemented, so that the homogeneity of a mixture of the sprayed concrete, the heat insulation performance of a hardened body and the strength development and durability under the high-temperature condition are comprehensively improved, and the temperature of a tunnel cavity can be effectively improved; the service life of the sprayed concrete under a high-temperature condition is prolonged. The thermal-insulation heat-resistant shotcrete technology is clear in action mechanism, simple in production process, excellent in performance and suitable for large-scale production, and has important significance on high-quality construction of underground engineering such as tunnels and mines in a high-ground-temperature environment and a high-temperature water bursting environment.
本发明公开了一种隔热耐热型喷射混凝土及其制备方法。这种隔热耐热型喷射混凝土是由水泥、改性硅灰浆、改性隔热陶粒、细骨料、水、外加剂、速凝剂等组分组成。本发明中通过引入使用水凝胶进行表面改性的高强页岩陶粒作为隔热填料，大幅提升了轻质骨料在浆体中的分散稳定能力，并具有较强吸水缓释能力和表面封闭功能，可以在高地温环境中起到孔隙隔热和储水释水内养护作用，辅以可以有效提升浆体水化产物高温稳定性和密实程度的改性硅灰浆，全面提升了喷射混凝土的拌合物的匀质性及硬化体的隔热性能及高温条件下的强度发展和耐久性，可以有效改善隧道洞室温度，提升喷射混凝土在高温条件下的服役寿命。该隔热耐热型喷射混凝土技术作用机理清晰、生产工艺简单、性能优秀，适用于大规模生产，对于高地温环境及高温涌水环境的隧道，矿井等地下工程的高质量建设具有重要意义。
Heat-insulation and heat-resistant shotcrete and preparation method thereof
一种隔热耐热型喷射混凝土及其制备方法
GUAN WENXUN (author) / CHENG GUANZHI (author) / YIN TIANJIAO (author) / XIE YONGJIANG (author) / LI DALIN (author) / LI SHIDA (author) / LI SHAOQING (author) / SUN CHANGMING (author) / WANG WEI (author) / WANG XU (author)
2024-05-07
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Heat-preservation, heat-insulation and fire-resistant composite board and preparation method thereof
| European Patent Office | 2021