Research on the preparation and properties of GBFS-based mud solidification materials

Gu, Yue; Zhang, Pengyu; Dong, Wentao; Sun, Qian; Yao, Guang; Lv, Ruochen

doi:10.1016/j.conbuildmat.2024.135900

Cited by 4 publications

(2 citation statements)

References 27 publications

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“…After demolding, the sample continued to cure in the curing box for 7 days, 14 days, and 28 days. The curing box was set to standard curing conditions: temperature (20 ± 2) °C, humidity 95% [ 41 ].…”

Section: Methodsmentioning

confidence: 99%

The Effects of Hydroxypropyl Methyl Cellulose and Metakaolin on the Properties of Self-Compacting Solidified Soil Based on Abandoned Slurry

Tang,

Huang,

Shen

et al. 2024

Materials

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As a new type of backfill material, Self-compacting solidified soil (SCSS) takes the abandoned slurry of cast-in-place piles after dewatering and reduction as the main raw material, which brings a problem of coordinating the working performance with the mechanical property under the condition of high mobility. In this paper, hydroxypropyl methyl cellulose (HPMC) and metakaolin were introduced as additives to solve this problem. First, the workability and mechanical properties of SCSS were regulated and optimized by means of the water seepage rate test, the flowability test, and the unconfined compressive strength test. Second, this study also used X-ray diffraction (XRD) and scanning electron microscopy (SEM) to investigate the effects of HPMC and metakaolin on the physical phase and microstructure of SCSS. In this way, the results showed that there was a significant impact on the flowability of SCSS, that is, when the dosage reached 0.3%, the water seepage rate of SCSS was reduced to less than 1%, and the compressive strength at 7 days reached its peak. At the same time, HPMC weakened the strength growth of SCSS in the age period of 7 days to 14 days. However, the addition of metakaolin promoted its compressive strength. XRD analysis showed that the additives had no significant effects on the physical phases. And, from the SEM results, it can be seen that although the water-retaining effect of HPMC makes hydration of cement more exhaustive, more ettringite (AFt) can be observed in the microstructure. In addition, it can be observed that the addition of metakaolin can generate more hydrated calcium silicate (C-S-H) due to the strong surface energy possessed by metakaolin. As a result of the above factors, SCSS filled the voids between particles and improved the interface structure between particles, thus enhanced the compressive strength.

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Section: Methodsmentioning

confidence: 99%

The Effects of Hydroxypropyl Methyl Cellulose and Metakaolin on the Properties of Self-Compacting Solidified Soil Based on Abandoned Slurry

Tang,

Huang,

Shen

et al. 2024

Materials

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“…Figure 1 shows the relation curve of the fluidity of solidified soil and the amount of AASC (with SN-30 as the control group). Generally, when the water-solid ratio is fixed, increasing the content of the curing agent results in a larger number of hydration products, leading to a gradual solidification of the silt and a corresponding decrease in the fluidity of the mixture [19]. However, as figure 1 demonstrates, the fluidity of the AASC solidified soil exhibits a trend of first increasing and then decreasing, with a threshold of 40% AASC content.…”

Section: Fluidity Testmentioning

confidence: 98%

Analysis of strength characteristics and microstructure of alkali-activated slag cement fluidized solidified soil

Liu,

Chen,

Chen

et al. 2024

Mater. Res. Express

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In order to solve such problems as difficulties in backfilling narrow foundation trenches in engineering, it was proposed to use alkali-activated slag cement (AASC) instead of traditional Portland cement to solidify silt and form AASC fluidized solidified soil. The effect of the content of AASC and the curing period on fluidized solidified soil was studied by unconfined compression strength test, SEM and EDS. Moreover, the root cause for the improvement of the strength by the microstructure was explored. The results showed that: The fluidity increased first and then decreased with the increase of the content of AASC; 40% was the optimal content; in the same curing period, the unconfined compression strength increased with the increase of the content; 40% was the optimal content; the soil with different contents could reach the most of the 28d strength on Day 7; AASC generated a lot of low-Ca/Si C-S-H gel that consolidated soil particles into a denser structure. These results provide a theoretical basis for the application of AASC in fluidized solidified soil engineering.

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Properties and microstructure of soil solidified by titanium slag-flue gas desulfurized gypsum-Portland cement composites as solidifiers

Feng,

Zhang,

Ren

2024

Construction and Building Materials

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Research on the preparation and properties of GBFS-based mud solidification materials

Cited by 4 publications

References 27 publications

The Effects of Hydroxypropyl Methyl Cellulose and Metakaolin on the Properties of Self-Compacting Solidified Soil Based on Abandoned Slurry

The Effects of Hydroxypropyl Methyl Cellulose and Metakaolin on the Properties of Self-Compacting Solidified Soil Based on Abandoned Slurry

Analysis of strength characteristics and microstructure of alkali-activated slag cement fluidized solidified soil

Properties and microstructure of soil solidified by titanium slag-flue gas desulfurized gypsum-Portland cement composites as solidifiers

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