Improvement in Water Resistance of Desulfurized Gypsum by Novel Modification of Silicone Oil Paraffin Composite Emulsion-based Waterproofing Agent

Cao, Jingyu; Li, Jin-Peng; Jiang, Yamei; Wang, Su‐Lei; Ding, Yi; Oh, Won-Chun

doi:10.4191/kcers.2019.56.6.10

Cited by 10 publications

(3 citation statements)

References 14 publications

(13 reference statements)

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“…Gypsum can creep under static loads in humid environments (9)(10)(11)(12), resulting in deformation of gypsum-based building materials. Some scholars used silicone oil paraffin composite emulsion-based waterproofing agent to improve the softening coefficient of the gypsum test block (13). The study indicated that when the content of silicone oil-paraffin composite emulsion waterproofing agent was 1%, the softening coefficient reached 0.89, representing a 60% increase in the softening coefficient.…”

Section: Morsy Polepszył Właściwości Fizyko-mechaniczne Zaczynów Z Wa...mentioning

confidence: 99%

“…Gips może ulegać pełzaniu pod wpływem obciążeń statycznych w środowiskach wilgotnych (9)(10)(11)(12), co prowadzi do deformacji materiałów budowlanych z gipsu. Niektórzy badacze użyli jako środka hydroizolacyjnego emulsji kompozytowej z olejem silikonowym i parafiną do poprawy współczynnika rozmiękania bloku testowego z gipsu (13). Badanie wskazało, że gdy zawartość emulsji z oleju silikonowego i parafiny wynosiła 1%, współczynnik rozmiękania osiągnął wartość 0,89, co oznacza jego zwiększenie o 60%.…”

Section: Introductionunclassified

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Mechanical performance and water resistance of a carbonated hemihydrate gypsum and slaked lime composite

Tian,

Wang,

Zhang

et al. 2024

Cement Wapno Beton

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In order to improve the strength and water resistance of hemihydrate gypsum, slaked lime was incorporated and a carbon dioxide curing technique was used. First, hemihydrate gypsum, slaked lime, and water were mixed at different proportions. The mixture was pressed into block samples by a compression machine at a pressure of 3 MPa and placed a curing kettle full of CO2 at a pressure of 0.3 MPa. The results of mechanical performance tests show that when the ratio of gypsum to lime is 7 to 3 and the water to solid ratio is 0.2, the compressive strength of the sample cured under CO2 can reach 29.1 MPa and the softening coefficient is 1.05. The results of microscopic characterization show that the main constituents are dihydrate gypsum and calcium carbonate. These observations will provide guidance to the application of carbonated hemihydrate gypsum and slaked lime composite.

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Section: Morsy Polepszył Właściwości Fizyko-mechaniczne Zaczynów Z Wa...mentioning

confidence: 99%

Section: Introductionunclassified

Mechanical performance and water resistance of a carbonated hemihydrate gypsum and slaked lime composite

Tian,

Wang,

Zhang

et al. 2024

Cement Wapno Beton

View full text Add to dashboard Cite

show abstract

“…This significantly limits their large-scale industrial application in the field of functional building materials [16]. At present, the main methods for improving the hydrophobicity of PG-based materials include the addition of an internal doping-type waterproofing agent [17,18], inorganic gel material modification [19][20][21], and the preparation and application of a surface hydrophobic coating [22][23][24]. Among these, the method of preparing and applying a hydrophobic coating on the surface of PG is not only simple and efficient but also does not negatively influence the compressive and flexural strength of the PG blocks [25].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance of H-PDMS/PMHS/OTS Hybrid Nanosilica Hydrophobic and Self-Cleaning Coatings on Phosphogypsum Surface

Yang,

Chen,

et al. 2023

Polymers

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Hemihydrate phosphogypsum, an industrial solid waste product of phosphoric acid production, is abundant and inexpensive. If the problem of poor water resistance is solved, this material could be substituted for cement and other traditional energy-consuming cementitious materials in the construction industry. This approach would confer important economic and environmental benefits while promoting the resource utilization of phosphogypsum (PG). In this study, hydrophobic and self-cleaning coatings of H-PDMS/PMHS/OTS hybrid nanosilica were prepared on a post-hydroxylated PG surface using sol–gel and impregnation methods. The water contact angle, Fourier-transform infrared spectroscopy, Three-dimensional surface morphology and roughness analysis, X-ray photoelectron spectroscopy, scanning electron microscopy, surface abrasion tests, and tape adhesion tests were used to evaluate the hydrophobicity of the coatings. The results demonstrated that the in situ reaction produced a hydrophobic siloxane/nanosilica hybrid network that bonded to the PG surface via hydrogen bonding, making the otherwise completely hydrophilic PG hydrophobic (PGH-3, contact angle (CA) = 144.1°). The PGH-3 sample exhibited excellent chemical stability, maintaining a contact angle greater than 135° under strongly acidic or alkaline conditions. The contact angle remained at 123.7° after 50 tape-bonding tests. After 100 wear cycles, the contact angle remained at 121.9°. This study presents an environmentally friendly method and a straightforward application procedure to impart hydrophobicity to solid waste PG. Its potential is thus demonstrated in the field of PG-based construction materials and the comprehensive utilization of solid waste.

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Edible and Nutritive Electronics: Materials, Fabrications, Components, and Applications

Shan

et al. 2020

Adv Materials Technologies

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In comparison with the implantable electronics, ingestible electronics are less invasive but can travel close to major organs through the gastrointestinal (GI) tract, monitor a wide range of biomarkers and therapeutic targets, and serve as effective clinical tools for diagnostics and therapy. [4d,5] Today, GI conditions have become one of the most prevalent health concerns in modern society. The market was expected to nearly reach the one-billion-dollar mark. [4e] Through analyzing the conditions of the GI tract [4d] (Figure 1), many diseases can be monitored and diagnosed, e.g., refluxing gastric fluid, cancer, motility disorders, infected and abnormally dilated venous vessels, gastritis, gastric ulcers, coeliac disease, lactose intolerance, Crohn's disease, inflammatory bowel disease, diverticular disease, constipation, clostridium difficile-associated diarrhea, irritable bowel syndrome, etc. [5,6] Conventional ingestible electronics mostly consist of inorganic materials and encapsulated with rigid nondegradable polymer, such as polydimethylsiloxane, parylene/epoxy, [4a] which will lead longer devices retention in the GI tract. This is one of the most significant risk elements during the application of conventional ingestible electronics. Fully food-based edible and nutritive electronics have emerged to address these potential risks. Edible electronics are new generation ingestible electronics. Recently, there is no accurate and clear definition of edible electronics. [4g,7] The definition of "transient electronics," [3h] which focused on implantable electronics, was similar to the edible electronics concept and defined as: made of biodegradable materials and can completely or partially dissolve, resorb, or physically disappear after functioning in environmental or physiological conditions at controlled rates. By follow this spirit, the definition of edible electronics is provided here: a class of microencapsulated electronic devices that consist of edible and nutritive inorganics and organics materials, meanwhile, that can be mainly dissolved, digested and absorbed after fulfilling the diagnosis or therapy of diseases in the gastrointestinal tract. The edible and nutritive inorganics always include edible inert metals, trace elements [8] and their oxides. Nutritive organics always include biopigments, and polymers. [7,9] A more systemic and expanded materials toolbox will be very helpful to advance The emerging novel edible and nutritive electronics indicate an important advance in ingestible and implantable electronics, covering multiple disciplines such as biomedicine, electronics, and nutriology. This review focuses on the feasibility and critical technical problems of fabricating fully edible and nutritive electronics. Recently, a limited number of fully edible and nutritive electronics, operating single functions, have been applied to monitor the condition of the gastrointestinal (GI) tract and diagnose its disorders. However, fully edible, nutritive, miniaturized, and well-functioning electronics with mu...

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Improvement in Water Resistance of Desulfurized Gypsum by Novel Modification of Silicone Oil Paraffin Composite Emulsion-based Waterproofing Agent

Cited by 10 publications

References 14 publications

Mechanical performance and water resistance of a carbonated hemihydrate gypsum and slaked lime composite

Mechanical performance and water resistance of a carbonated hemihydrate gypsum and slaked lime composite

Preparation and Performance of H-PDMS/PMHS/OTS Hybrid Nanosilica Hydrophobic and Self-Cleaning Coatings on Phosphogypsum Surface

Edible and Nutritive Electronics: Materials, Fabrications, Components, and Applications

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