A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Alkali-activated tailing-based composite cementing material and preparation method thereof
The invention relates to an alkali-activated composite cementing material prepared from sialic copper tailings and a preparation method of the alkali-activated composite cementing material. The preparation method comprises the following steps: 1) uniformly mixing the sialic copper tailings calcined at high temperature and coal gangue to obtain composite powder; 2) mixing liquid water glass with sodium hydroxide to prepare alkali activator solutions with different moduli; (3) adding an alkali activator solution into the composite powder, and uniformly stirring the solution to obtain slurry; 4) pouring the slurry into a mold for vibration molding, and curing the slurry in a curing box until demolding to obtain an initial setting test piece; and 5) naturally placing and storing the initial setting test piece. The invention has the beneficial effects that a solidified body of the alkali-activated cementing material provided by the invention has excellent mechanical properties, wherein the 3D compressive strength of the optimal ratio is greater than 18MPa, and the 28d compressive strength of the optimal ratio is greater than 26MPa; the product meets the standard value of compressive strength of C20 concrete cubes, provides a certain possibility for commercial use, can be used as a mine backfill filling material, and can significantly improve the resource utilization of the copper tailings and coal gangue.
本发明涉及一种利用硅铝质铜尾矿制备的碱激发复合胶凝材料及其制备方法，包括有以下步骤：1）将高温煅烧的硅铝质铜尾矿和煤矸石均匀混合得到复合粉体；2）将液态水玻璃和氢氧化钠混合，制得不同模数的碱激发剂溶液；3）将碱激发剂溶液加入到复合粉体中，搅拌均匀得到浆体；4）将浆体倒入模具中振动成型并在养护箱中养护至脱模，得到初凝试件；5）将初凝试件自然放置保存。本发明的有益效果在于：本发明提供的碱激发胶凝材料固化体具备优良的力学性能，最优配比的3d抗压强度>18MPa，28d抗压强度>26MPa，满足C20混凝土立方体抗压强度标准值，为其商用提供一定的可能性，同时可作为矿山回填填充材料，能显著提高铜尾矿及煤矸石的资源化利用。
Alkali-activated tailing-based composite cementing material and preparation method thereof
The invention relates to an alkali-activated composite cementing material prepared from sialic copper tailings and a preparation method of the alkali-activated composite cementing material. The preparation method comprises the following steps: 1) uniformly mixing the sialic copper tailings calcined at high temperature and coal gangue to obtain composite powder; 2) mixing liquid water glass with sodium hydroxide to prepare alkali activator solutions with different moduli; (3) adding an alkali activator solution into the composite powder, and uniformly stirring the solution to obtain slurry; 4) pouring the slurry into a mold for vibration molding, and curing the slurry in a curing box until demolding to obtain an initial setting test piece; and 5) naturally placing and storing the initial setting test piece. The invention has the beneficial effects that a solidified body of the alkali-activated cementing material provided by the invention has excellent mechanical properties, wherein the 3D compressive strength of the optimal ratio is greater than 18MPa, and the 28d compressive strength of the optimal ratio is greater than 26MPa; the product meets the standard value of compressive strength of C20 concrete cubes, provides a certain possibility for commercial use, can be used as a mine backfill filling material, and can significantly improve the resource utilization of the copper tailings and coal gangue.
本发明涉及一种利用硅铝质铜尾矿制备的碱激发复合胶凝材料及其制备方法，包括有以下步骤：1）将高温煅烧的硅铝质铜尾矿和煤矸石均匀混合得到复合粉体；2）将液态水玻璃和氢氧化钠混合，制得不同模数的碱激发剂溶液；3）将碱激发剂溶液加入到复合粉体中，搅拌均匀得到浆体；4）将浆体倒入模具中振动成型并在养护箱中养护至脱模，得到初凝试件；5）将初凝试件自然放置保存。本发明的有益效果在于：本发明提供的碱激发胶凝材料固化体具备优良的力学性能，最优配比的3d抗压强度>18MPa，28d抗压强度>26MPa，满足C20混凝土立方体抗压强度标准值，为其商用提供一定的可能性，同时可作为矿山回填填充材料，能显著提高铜尾矿及煤矸石的资源化利用。
Alkali-activated tailing-based composite cementing material and preparation method thereof
一种碱激发尾矿基复合胶凝材料及其制备方法
ZHANG DONGDONG (author) / FENG TIANYAN (author) / TAN BO (author) / YANG ZHIJIE (author) / SHA CHENGHAO (author) / QU GUANGFEI (author) / ZHANG YINGJIE (author)
2021-07-16
Patent
Electronic Resource
Chinese
IPC:
C04B
Kalk
,
LIME
Antimony tailing powder-based alkali-activated cementing material and preparation method thereof
| European Patent Office | 2021
Lead-zinc tailing-based alkali-activated cementing material and application thereof
| European Patent Office | 2022
| European Patent Office | 2023
Cement-based composite alkali-activated cementing material and preparation method thereof
| European Patent Office | 2021
Activated low-silicon iron tailing powder and composite cementing material preparation method
| European Patent Office | 2023