Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Method for preparing high-strength microbial mortar from nano calcium carbonate
The invention provides a method for preparing high-strength microbial mortar by using nano calcium carbonate, which comprises the following steps: mixing quartz sand with different particle sizes to prepare an aggregate matrix, then mixing nano calcium carbonate, water and quartz sand to prepare nano calcium carbonate-quartz sand mortar, then loading the mortar into a mold to prepare a sample, and finally preparing the high-strength microbial mortar by using nano calcium carbonate. And finally, the bacterial liquid, the stationary liquid and the cementing liquid are used for grouting reinforcement, and the high-strength microbial rock is obtained after grouting reinforcement is conducted for four times. Sandy soil is solidified according to the principle that microorganisms induce calcium carbonate precipitation, a proper amount of nano calcium carbonate is doped to obtain the nano calcium carbonate-quartz sand mortar, the yield of calcium carbonate is increased through the crystal nucleus effect of nano calcium carbonate in the process that the microorganisms induce calcium carbonate precipitation, and the mechanical property of the calcium carbonate is improved; the precipitation amount of calcium carbonate is increased by 69.9%, the strength is increased by 277.75%, and the maximum unconfined compressive strength of a cured sandy soil sample can reach 29.2 Mpa. In addition, the invention also has the characteristics of low cost, simple preparation process and small environmental pollution.
本发明提供一种利用纳米碳酸钙制备高强微生物砂浆的方法，包括：将不同粒径石英砂混合制备骨料基体，然后将纳米碳酸钙、水和石英砂进行混合制备纳米碳酸钙‑石英砂砂浆，之后将砂浆装入模具中制备试样，最后使用菌液、固定液和胶结液进行注浆加固，注浆加固4次后得到高强微生物岩石。本发明利用微生物诱导碳酸钙沉淀原理固化砂土，通过掺入适量的纳米碳酸钙得到纳米碳酸钙‑石英砂砂浆，利用纳米碳酸钙在微生物诱导碳酸钙沉淀过程中的晶核作用增加碳酸钙产率以提升其力学性能，经过4次注浆加固后，碳酸钙沉淀量提升69.9％，强度提升277.75％，固化后的砂土试样无侧限抗压强度最高可达29.2Mpa。此外，本发明还具有成本低、制备工序简单、环境污染小的特点。
Method for preparing high-strength microbial mortar from nano calcium carbonate
The invention provides a method for preparing high-strength microbial mortar by using nano calcium carbonate, which comprises the following steps: mixing quartz sand with different particle sizes to prepare an aggregate matrix, then mixing nano calcium carbonate, water and quartz sand to prepare nano calcium carbonate-quartz sand mortar, then loading the mortar into a mold to prepare a sample, and finally preparing the high-strength microbial mortar by using nano calcium carbonate. And finally, the bacterial liquid, the stationary liquid and the cementing liquid are used for grouting reinforcement, and the high-strength microbial rock is obtained after grouting reinforcement is conducted for four times. Sandy soil is solidified according to the principle that microorganisms induce calcium carbonate precipitation, a proper amount of nano calcium carbonate is doped to obtain the nano calcium carbonate-quartz sand mortar, the yield of calcium carbonate is increased through the crystal nucleus effect of nano calcium carbonate in the process that the microorganisms induce calcium carbonate precipitation, and the mechanical property of the calcium carbonate is improved; the precipitation amount of calcium carbonate is increased by 69.9%, the strength is increased by 277.75%, and the maximum unconfined compressive strength of a cured sandy soil sample can reach 29.2 Mpa. In addition, the invention also has the characteristics of low cost, simple preparation process and small environmental pollution.
本发明提供一种利用纳米碳酸钙制备高强微生物砂浆的方法，包括：将不同粒径石英砂混合制备骨料基体，然后将纳米碳酸钙、水和石英砂进行混合制备纳米碳酸钙‑石英砂砂浆，之后将砂浆装入模具中制备试样，最后使用菌液、固定液和胶结液进行注浆加固，注浆加固4次后得到高强微生物岩石。本发明利用微生物诱导碳酸钙沉淀原理固化砂土，通过掺入适量的纳米碳酸钙得到纳米碳酸钙‑石英砂砂浆，利用纳米碳酸钙在微生物诱导碳酸钙沉淀过程中的晶核作用增加碳酸钙产率以提升其力学性能，经过4次注浆加固后，碳酸钙沉淀量提升69.9％，强度提升277.75％，固化后的砂土试样无侧限抗压强度最高可达29.2Mpa。此外，本发明还具有成本低、制备工序简单、环境污染小的特点。
Method for preparing high-strength microbial mortar from nano calcium carbonate
一种利用纳米碳酸钙制备高强微生物砂浆的方法
LIU XIANFENG (Autor:in) / LIN WENBIN (Autor:in) / CHEN XIANGHANG (Autor:in) / CHEN CHAOFENG (Autor:in) / LIN HONGXIN (Autor:in) / ZHAO RUI (Autor:in)
30.07.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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