The influence of the number of injections of bio-composite cement on the properties of bio-sandstone cemented by bio-composite cement

Yu, Xiaoniu; Qian, Chunxiang; Sun, Lijun

doi:10.1016/j.conbuildmat.2018.01.014

Cited by 27 publications

(17 citation statements)

References 31 publications

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“…Yu et al . [53] used Sporosarcina pasteurii to treat loose quartz sand in columns through injection method. Magnesium chloride (MgCl 2 ) was used instead of calcium salts; thus, magnesium carbonates were precipitated.…”

Section: Hcomentioning

confidence: 99%

Insights into the Current Trends in the Utilization of Bacteria for Microbially Induced Calcium Carbonate Precipitation

et al. 2020

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Nowadays, microbially induced calcium carbonate precipitation (MICP) has received great attention for its potential in construction and geotechnical applications. This technique has been used in biocementation of sand, consolidation of soil, production of self-healing concrete or mortar, and removal of heavy metal ions from water. The products of MICP often have enhanced strength, durability, and self-healing ability. Utilization of the MICP technique can also increase sustainability, especially in the construction industry where a huge portion of the materials used is not sustainable. The presence of bacteria is essential for MICP to occur. Bacteria promote the conversion of suitable compounds into carbonate ions, change the microenvironment to favor precipitation of calcium carbonate, and act as precipitation sites for calcium carbonate crystals. Many bacteria have been discovered and tested for MICP potential. This paper reviews the bacteria used for MICP in some of the most recent studies. Bacteria that can cause MICP include ureolytic bacteria, non-ureolytic bacteria, cyanobacteria, nitrate reducing bacteria, and sulfate reducing bacteria. The most studied bacterium for MICP over the years is Sporosarcina pasteurii. Other bacteria from Bacillus species are also frequently investigated. Several factors that affect MICP performance are bacterial strain, bacterial concentration, nutrient concentration, calcium source concentration, addition of other substances, and methods to distribute bacteria. Several suggestions for future studies such as CO2 sequestration through MICP, cost reduction by using plant or animal wastes as media, and genetic modification of bacteria to enhance MICP have been put forward.

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Section: Hcomentioning

confidence: 99%

Insights into the Current Trends in the Utilization of Bacteria for Microbially Induced Calcium Carbonate Precipitation

et al. 2020

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“…To study the growth of a colony of microorganisms on a concrete plane [6][7][8][9], it is necessary to study the morphological and temporal characteristics of such growth under various initial conditions, as well as to establish the relationship between the morphological characteristics of bacteria and their growth rate as a factor that generally characterizes their activity. In this model, each microorganism in the colony is modeled separately, and this approach allows us to better understand the statistical principles of the growth kinetics of microorganisms.…”

Section: Discussionmentioning

confidence: 99%

“…Its activity is determined by the mineralogical composition, dispersion, the presence of defects in the structure of minerals, etc. To increase the activity of cement, mechanical action, the introduction of electrolytes, additives of mineral and surfactants, electric and magnetic fields are used [3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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The study of the hardening process Portland cement`s concrete with bio cementing additives

et al. 2020

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The paper presents the results of studying the hardening processes of concrete based on Portland cement using biocementing additives. Isolated 11 strains of various bacteria were used as dietary supplements. The bacteria were grown at a temperature of 30 °C in an aerated fermenter with a stirrer speed of 550–600 rpm. The morphology of the concrete surface was evaluated before and after the application of the substrate with the nutrient medium; the appearance of a new phase was recorded after 2 weeks. The effect of cementation conditions on the compressive strength of biocemented concrete specimens was studied, and the capillary water`s coefficients absorption were determined.

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“…The XCT was Y. CT Precision S series high-precision computed tomography system from YXLON, Germany, with a resolution of micrometers. The test method was described in the literature [8]. XCT in situ trace tests were performed on sand columns with different cementation times (2, 4, and 6 times).…”

Section: D Pore Structure Evolution Of Biosandstone Produced Using Dmentioning

confidence: 99%

Biocomposite Cement-Based Mortar

Yu¹,

Gao²

2019

Sustainable Construction and Building Materials

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This chapter presents the preparation of a new kind of biocement based on the biophosphate minerals, which have cementation, by the bacteria reacting with the substrate. Ammonia/ammonium can be changed into environment-friendly struvite when the soluble phosphate is added to biocarbonate cement. After that, struvite and carbonate, which can be considered as composite cements, are applied to cement loose particles. The biocement is environmentally friendly, which has important application prospects. Based on mixing-precipitation process, the injection process was adopted to bind loose sand particles. Permeability, porosity, compressive strength, and internal microstructure of the biosandstones cemented by composite cement were determined under different number of injections. Mixing-precipitation process was inferior to injection process according to compressive strength of the biosandstones caused by the particle size and morphology of composite cement. Permeability, porosity, compressive strength, and fixation ammonia ratio of the biosandstones were compared when three different formulations of composite cement (CJ1, CJ1.5, and CJ2) were adopted to bind sand columns. The results show that the CJ2 has the best overall performance. The molar ratio of K 2 HPO 4 •3H 2 O and urea was 2:1 in the CJ2 formulation.

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The influence of the number of injections of bio-composite cement on the properties of bio-sandstone cemented by bio-composite cement

Cited by 27 publications

References 31 publications

Insights into the Current Trends in the Utilization of Bacteria for Microbially Induced Calcium Carbonate Precipitation

Insights into the Current Trends in the Utilization of Bacteria for Microbially Induced Calcium Carbonate Precipitation

The study of the hardening process Portland cement`s concrete with bio cementing additives

Biocomposite Cement-Based Mortar

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