【摘要】：選用巴斯德芽孢桿菌,對(duì)微生物誘導(dǎo)鈣離子、鎂離子以及鐵離子形成碳酸鹽固化松散珊瑚砂顆粒的效果進(jìn)行對(duì)比研究。試驗(yàn)結(jié)果表明,在相同試驗(yàn)方法、相同注入次數(shù)的條件下,微生物誘導(dǎo)形成的碳酸鈣和碳酸鎂能將珊瑚砂松散顆粒固化成為整體,加入鐵離子的試樣因?yàn)榉磻?yīng)過程的原因沒有成功。通過滲透性、干密度變化、無側(cè)限抗壓強(qiáng)度及微觀結(jié)構(gòu)等方面進(jìn)行對(duì)比分析,鈣離子試樣相對(duì)于鎂離子試樣,具有固化過程平穩(wěn)、干密度增量大、強(qiáng)度高、微觀顆粒包裹更好的優(yōu)點(diǎn)。綜合試驗(yàn)結(jié)果得出,鈣離子是現(xiàn)階段微生物固化珊瑚砂較為理想的金屬離子。本試驗(yàn)首次探討了金屬離子種類對(duì)珊瑚砂微生物固化效果的影響,為微生物固化技術(shù)提供了一定理論基礎(chǔ),對(duì)該技術(shù)的進(jìn)一步應(yīng)用具有一定借鑒意義。
[Abstract]:The effects of calcium, magnesium and iron ions induced by microbes on the formation of carbonate solidified loose coral sand particles were studied by using Pasteurella spp. The results showed that under the same test method and the same injection times, calcium carbonate and magnesium carbonate induced by microorganisms could solidify the loose particles of coral sand into a whole. The sample with iron ion did not succeed because of the reaction process. Through the comparative analysis of permeability, dry density change, unconfined compressive strength and microstructure, the calcium ion sample has steady curing process, large dry density increment and high strength compared with magnesium ion sample. Microparticles encapsulate better advantages. The results show that calcium ion is an ideal metal ion for microorganism solidified coral sand at present. The effect of metal ions on the microbial solidification effect of coral sand is discussed for the first time, which provides a theoretical basis for the microbial solidification technology, and has a certain reference value for the further application of this technology.
【作者單位】： 中國人民解放軍后勤工程學(xué)院土木工程系;重慶科技學(xué)院建筑工程學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(51479208,11272354) 總后勤部基建營房部資助項(xiàng)目(CY114C022)~~
【分類號(hào)】：P75

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