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High-ductility cement-based material in ultralow-temperature environment as well as preparation method and application thereof
The invention discloses a high-ductility cement-based material in an ultralow-temperature environment as well as a preparation method and application of the high-ductility cement-based material. The material is prepared from cement, fly ash, silica fume, river sand, water, PVA fibers, a high-effiency water reducing agent and the like as raw materials. The preparation method comprises the following steps: 1) dry-mixing and dispersing the cementing material; 2) adding fine aggregate for dry mixing; 3) adding water and mixing; (4) adding the water reducing agent; (5) adding the PVA fibers; (6) preparing the high-ductility cement-based composite material; and 7) performing an axial compression test, a bending test and a toughness evaluation test on the high-toughness cement-based material. The problem of degradation of various mechanical properties of the traditional material in low-temperature storage equipment is solved, the problem that the common concrete material is easy to crack at ultralow temperature is solved, it is guaranteed that an LNG storage tank has good working performance and crack control capacity under the extreme environment of -196 DEG C, and the technical requirements of the LNG low-temperature storage tank are met.
本发明公开了一种超低温环境下高延性水泥基材料及其制备方法、应用。包括水泥、粉煤灰、硅灰、河砂、水、PVA纤维、高效减水剂等作为原材料进行配置。制备方法包括以下步骤：1)胶凝材料干拌分散；2)加入细骨料干拌；3)加水拌和；4)减水剂的添加；5)PVA纤维的添加；6)高延性水泥基复合材料的制备；7)对高韧性水泥基材料进行轴心抗压试验、抗弯试验以及韧性评估试验，解决传统材料在低温储蓄设备中各项力学性能退化问题，克服普通混凝土材料在超低温下易开裂问题，保证LNG液化储罐在‑196℃的极端环境下具有良好的工作性能和裂缝控制能力，满足LNG液化天然气低温储罐技术问题。
High-ductility cement-based material in ultralow-temperature environment as well as preparation method and application thereof
The invention discloses a high-ductility cement-based material in an ultralow-temperature environment as well as a preparation method and application of the high-ductility cement-based material. The material is prepared from cement, fly ash, silica fume, river sand, water, PVA fibers, a high-effiency water reducing agent and the like as raw materials. The preparation method comprises the following steps: 1) dry-mixing and dispersing the cementing material; 2) adding fine aggregate for dry mixing; 3) adding water and mixing; (4) adding the water reducing agent; (5) adding the PVA fibers; (6) preparing the high-ductility cement-based composite material; and 7) performing an axial compression test, a bending test and a toughness evaluation test on the high-toughness cement-based material. The problem of degradation of various mechanical properties of the traditional material in low-temperature storage equipment is solved, the problem that the common concrete material is easy to crack at ultralow temperature is solved, it is guaranteed that an LNG storage tank has good working performance and crack control capacity under the extreme environment of -196 DEG C, and the technical requirements of the LNG low-temperature storage tank are met.
本发明公开了一种超低温环境下高延性水泥基材料及其制备方法、应用。包括水泥、粉煤灰、硅灰、河砂、水、PVA纤维、高效减水剂等作为原材料进行配置。制备方法包括以下步骤：1)胶凝材料干拌分散；2)加入细骨料干拌；3)加水拌和；4)减水剂的添加；5)PVA纤维的添加；6)高延性水泥基复合材料的制备；7)对高韧性水泥基材料进行轴心抗压试验、抗弯试验以及韧性评估试验，解决传统材料在低温储蓄设备中各项力学性能退化问题，克服普通混凝土材料在超低温下易开裂问题，保证LNG液化储罐在‑196℃的极端环境下具有良好的工作性能和裂缝控制能力，满足LNG液化天然气低温储罐技术问题。
High-ductility cement-based material in ultralow-temperature environment as well as preparation method and application thereof
超低温环境下高延性水泥基材料及其制备方法、应用
SU JUN (author) / QIAN WEIMIN (author) / ZHAO JIAYU (author)
2021-07-09
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
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