Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Low-calcium high-aluminum coal gangue cement admixture and preparation process thereof
The invention relates to the technical field of solid waste utilization, in particular to a low-calcium high-aluminum coal gangue cement admixture and a preparation process thereof. The admixture can be prepared by carrying out calcium increase and calcination activation treatment on solid waste powder, and calcium increase and activation can be realized by a powder mixture of the solid waste powder and calcium hydroxide under a heating condition; and a part of aluminum oxide components in the solid waste powder and nascent calcium oxide are promoted to form hydraulic minerals of CaO. 2Al2O3 and 12CaO. 7Al2O3 types in the calcining process. The residual aluminum oxide component in the admixture can be chemically combined with a cement reaction product in the subsequent hydration process to form a 4CaO. Al2O3. 13H2O type hydration product, so that the low-calcium high-aluminum coal gangue admixture-cement has higher compressive strength. The method is high in pertinence, simple to operate, low in cost, high in efficiency and remarkable in strengthening effect, and has a wide application prospect in comprehensive utilization of the low-calcium high-aluminum coal gangue.
本发明涉及固废利用技术领域，具体是一种低钙高铝煤矸石水泥掺合料及其制备工艺。该掺合料可通过将固废粉末进行增钙并煅烧活化处理制备得到，在加热条件下固废粉末与氢氧化钙的粉末混合物能够实现增钙和活化，促成固废粉末中的一部分氧化铝组分与新生态的氧化钙在煅烧过程中形成CaO·2Al2O3和12CaO·7Al2O3类型的水硬性矿物。该掺合料中的剩余的氧化铝组分还能在后续的水化过程中与水泥的反应产物化合形成4CaO·Al2O3·13H2O型水化产物，使低钙高铝煤矸石掺合料‑水泥具有较高的抗压强度。本发明针对性强、操作简单、成本低、效率高、强化效果显著，对综合利用低钙高铝煤矸石具有广阔的应用前景。
Low-calcium high-aluminum coal gangue cement admixture and preparation process thereof
The invention relates to the technical field of solid waste utilization, in particular to a low-calcium high-aluminum coal gangue cement admixture and a preparation process thereof. The admixture can be prepared by carrying out calcium increase and calcination activation treatment on solid waste powder, and calcium increase and activation can be realized by a powder mixture of the solid waste powder and calcium hydroxide under a heating condition; and a part of aluminum oxide components in the solid waste powder and nascent calcium oxide are promoted to form hydraulic minerals of CaO. 2Al2O3 and 12CaO. 7Al2O3 types in the calcining process. The residual aluminum oxide component in the admixture can be chemically combined with a cement reaction product in the subsequent hydration process to form a 4CaO. Al2O3. 13H2O type hydration product, so that the low-calcium high-aluminum coal gangue admixture-cement has higher compressive strength. The method is high in pertinence, simple to operate, low in cost, high in efficiency and remarkable in strengthening effect, and has a wide application prospect in comprehensive utilization of the low-calcium high-aluminum coal gangue.
本发明涉及固废利用技术领域，具体是一种低钙高铝煤矸石水泥掺合料及其制备工艺。该掺合料可通过将固废粉末进行增钙并煅烧活化处理制备得到，在加热条件下固废粉末与氢氧化钙的粉末混合物能够实现增钙和活化，促成固废粉末中的一部分氧化铝组分与新生态的氧化钙在煅烧过程中形成CaO·2Al2O3和12CaO·7Al2O3类型的水硬性矿物。该掺合料中的剩余的氧化铝组分还能在后续的水化过程中与水泥的反应产物化合形成4CaO·Al2O3·13H2O型水化产物，使低钙高铝煤矸石掺合料‑水泥具有较高的抗压强度。本发明针对性强、操作简单、成本低、效率高、强化效果显著，对综合利用低钙高铝煤矸石具有广阔的应用前景。
Low-calcium high-aluminum coal gangue cement admixture and preparation process thereof
一种低钙高铝煤矸石水泥掺合料及其制备工艺
LI LIANG (Autor:in) / ZHANG MINGJUN (Autor:in) / AN JIAN (Autor:in) / TIAN LIJUN (Autor:in) / WANG JIAYOU (Autor:in) / YANG FAN (Autor:in) / WANG QIANG (Autor:in)
29.09.2023
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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