Properties of cement-based bolt-grouting materials modified with alunite and gypsum

Tan, Yuehu; Wang, Yuan; Yang, Qing; Lü, Chunhua

doi:10.1680/jadcr.15.00064

Cited by 4 publications

(2 citation statements)

References 12 publications

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“…2 lists the mix proportions of MPC-based grouting materials containing different additions of industrial wastes. It was prepared by a two-component grouting method in a 1 : 1 mass ratio [27]. In the current research, ADP can directly react with GGBS and RM.…”

Section: Raw Materialsmentioning

confidence: 99%

Characterization of Magnesium Potassium Phosphate Cement-Based Grouting Material Blended with High Volume Industrial Wastes

Zhang

Jia

Wang

et al. 2022

Advances in Materials Science and Engineering

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In the present research, industrial wastes, e.g., fly ash (FA), lithium slag (LS), ground granulated blast furnace slag (GGBS), and red mud (RM) were utilized to prepare the magnesium phosphate cement (MPC)-based grouting material by a two-component grouting method. Successive additions of GGBS within 40% (C1–C5) led to reduced fluidity, increased pH value, and shortened setting time. The compressive strength increased first and then decreased. The strength value reached the maximum at a 20% dosage (C3). Increasing the content of RM from 0% (C4) to 25% (C9) resulted in prolonged setting time and an increased pH value. The fluidity and compressive strength increased first and then decreased. The fluidity and strength value became the highest at a 15% additive ratio (C7). GGBS can significantly improve the strength and water resistance at 7 days and 28 days by the potential hydraulic property. RM has a smaller particle size than MP, making the microstructure denser by the pore-filling effect. Thus, the drying shrinkage was increased after adding GGBS, while it was decreased when incorporating RM. The MPC-based grouting material has a controllable short setting of 3–21 min, self-leveling fluidity above 200 mm, a near-neutral pH value, high early strength (1 day compressive strength of 5 MPa), minor drying shrinkage (one-tenth of OPC), and excellent water resistance (over 85%), which is much superior to traditional grouting materials.

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Section: Raw Materialsmentioning

confidence: 99%

Characterization of Magnesium Potassium Phosphate Cement-Based Grouting Material Blended with High Volume Industrial Wastes

Zhang

Jia

Wang

et al. 2022

Advances in Materials Science and Engineering

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“…So, searching for optimal cements requires market segmentation. Two of the papers are examples of that, looking for new solutions for grouting (Dai et al, 2016) and corrosion protection (Chousidis et al, 2016). The properties of formulations intended for rock anchor bolts are shown by Dai et al (2016) to benefit from controlled additions of alunite and gypsum.…”

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confidence: 99%

Editorial

John

Glasser

2016

Advances in Cement Research

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We should never forget that research is about solving society's problems, improving our understanding of nature and materials, and creating knowledge that allows scientists and engineers to solve problems. Therefore, the ultimate goal of research is not to publish papers; however, papers published by peer-review journals, such as Advances in Cement Research (ACR), are the best proven way to disseminate the, hopefully, relevant findings, allowing peers to build on top of what has already been discovered. This is how science and, to some extent technology, is increasingly progressing.It must be the top priority for our small research community to search for economically valid, technical solutions to mitigate the emission of anthropogenic greenhouse gases on a large scale (billions of tonnes of cement and CO 2 every year). Improving binder and filler fine particles allows the amount of water that is necessary to be reduced for good rheological behaviour, and, indirectly, the amount of clinker that is about 90% of the source of CO 2 emissions of conventional cementitious materials. There are two relevant papers on dispersants or superplasticisers (Li et al. and Wang et al.). The passivation of steel and improved matrix resistance to chloride penetration are shown by Li et al. (2016) to be improved by the addition of iron mill scale, itself hitherto regarded as a waste product. The use of superplasticisers is well established but a paper by Wang et al. (2016) explains the action of new types of polycarboxylate formulations on improving the properties of fresh cements, while the rheological properties of fresh mixes leads to important modifications to mix rheology .In the last few years, clinker substitution rates have stagnated due to the limited availability of the best supplementary cementitious materials (SCMs); blast furnace slag and fly ash. The possibility of transforming high-magnesium (Mg) calcium carbonates, including dolomite, in reactive SCMs, was presented in the paper by Jauffret and Glasser (2016). Dolomite is used to save cement, and hence lower CO 2 emissions, while at the same time, not have much of an impact on the high pH buffering reserves necessary to protect and passivate embedded steel. The suggestion of the low expansion risk associated with the hydration of magnesium oxide may be also good news for the use of high-magnesium carbonates as cement fillers.The cement industry uses the same cements to produce a wide variety of solutions, this approach rarely results in optimised solutions. So, searching for optimal cements requires market Another strategy to reduce the environmental impacts of cementitious materials is dematerialisation. Fibre-reinforced cementitious materials are an effective way of doing so. Two of the papers make interesting contributions to testing and improving the knowledge of fracture of such materials. They describe modifications to the properties of fresh and hardened cement matrices; the strain hardening of cement and concrete compositions and of reinforced composites is...

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Solidification/stabilization of stainless steel pickling residue with aluminum potassium sulfate amended fly ash

Zhang

2019

Journal of Cleaner Production

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Properties of cement-based bolt-grouting materials modified with alunite and gypsum

Cited by 4 publications

References 12 publications

Characterization of Magnesium Potassium Phosphate Cement-Based Grouting Material Blended with High Volume Industrial Wastes

Characterization of Magnesium Potassium Phosphate Cement-Based Grouting Material Blended with High Volume Industrial Wastes

Editorial

Solidification/stabilization of stainless steel pickling residue with aluminum potassium sulfate amended fly ash

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