Strength and Water-Repelling Properties of Cement Mortar Mixed with Water Repellents

Hye-Ju, Kang; Kang, Suk-Pyo; Lee, Byoungky

doi:10.3390/ma14185407

Cited by 13 publications

(6 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…measured the contact angle of Portland cement‐based concrete to be 15˚. [ 38 ] Ahmed et al. measured the contact angle as 30° by coating N,N ‐dimethylacrylamide (DMAAm) gel on a PDMS substrate.…”

Section: Resultsmentioning

confidence: 99%

“…Kang et al measured the contact angle of Portland cement-based concrete to be 15˚. [38] Ahmed et al measured the contact angle as 30° by coating N,Ndimethylacrylamide (DMAAm) gel on a PDMS substrate. [39] The original concrete and NC hydrogel-coated concrete in this study showed similar behavior to the contact angles of the previous studies.…”

Section: Surface Analysis Of Original Concrete and Nc Hydrogel-coated...mentioning

confidence: 99%

“…Due to the porosity and capillary structure present on the surface of the original concrete, water droplets are quickly absorbed. [36,38] The contact angle of NC hydrogel-coated concrete decreased sharply with increasing droplet loading time (Figure 5j). In just 2 s, the contact angle of the loaded droplet changed to 0°.…”

Section: Surface Analysis Of Original Concrete and Nc Hydrogel-coated...mentioning

confidence: 99%

See 2 more Smart Citations

Spray Coating of Nanosilicate‐Based Hydrogel on Concrete

Kim

Han

Rhie

et al. 2022

Adv Materials Inter

View full text Add to dashboard Cite

superior properties of the substrate (e.g., strength, stiffness, and toughness). [2] This has allowed for applications in new fields, such as in engineering and medicine. [1,3] Such new applications include coatings of antifouling-antimicrobial hydrogels for infection prevention, [4] hydrogel adhesion to metal substrates for marine antifouling, [5] coatings of mechanically matched hydrogels to improve the biocompatibility of neural implants, [6] chemical-sensing hydrogel interferometerbased sensing platforms, [7] and glass fiber hydrogel coatings for selective oil-water separation. [8] Hydrogel coatings can be also applied to concrete materials. Concrete is widely used as a building material due to its low cost, high strength, good durability, plasticity, and versatility. [9][10][11] However, concrete structures are vulnerable to corrosion and weathering by the external environment (freezing, acid rain, etc.) due to their hydrophilicity and porous structure. [10] Many researchers have put substantial effort into fixing concrete damage. Xu et al. coated concrete with a colorful superhydrophobic material. [10] The coated concrete had enhanced anti-icing, anticorrosion, and self-cleaning properties. Song et al. coated concrete with microcapsules containing a healing agent to prevent the deterioration of the concrete. [12] In addition, because of the excellent properties of concrete, many concrete structures have been built in urban areas. This has caused environmental problems such as high energy consumption in city centers, global warming caused by refrigerants in cooling equipment, ozone layer depletion, urban heat island phenomenon, and poor indoor air quality. [13] Feng et al., [13] Cui et al., [14] and Rotzetter et al. [15] stated there may be an energy saving effect by cooling buildings using the evaporation heat of hydrogel. Since concrete structures and the external environment are interconnected, research to address the issues with concrete structures is urgently needed. In particular, in light of numerous studies, hydrogels are considered a promising material to solve the problem between the concrete and the environment.In our previous study, we developed a NC hydrogel that strongly adheres to concrete. [16] In general, for strong adhesion between the hydrogel and the substrate, surface modification of the substrate and the formation of a primer layer are essential. [17,18] On the other hand, nanosilicate-based hydrogels have excellent coating durability without pretreatment due to the following factors: (1) NC hydrogel adheres to concrete by chemical reaction between nanosilicate and portlandite. [19] Hydrogels can be coated on various substrates to add a variety of functions to the substrates. In this study, hydrogel is coated on concrete that widely used as a building material. In general, in order to coat hydrogel on concrete, a prior process such as surface modification or primer layer coating is essential. However, this process is time consuming and requires the use of toxic chemicals. In this study,...

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Surface Analysis Of Original Concrete and Nc Hydrogel-coated...mentioning

confidence: 99%

Section: Surface Analysis Of Original Concrete and Nc Hydrogel-coated...mentioning

confidence: 99%

See 1 more Smart Citation

Spray Coating of Nanosilicate‐Based Hydrogel on Concrete

Kim

Han

Rhie

et al. 2022

Adv Materials Inter

View full text Add to dashboard Cite

show abstract

“…This is confirmed by Kang, H. et. al, who showed that CA after hydrophobization of cement mortar surfaces ranged from 126° to 132° [37].…”

Section: Contact Angle (Ca)mentioning

confidence: 99%

Modification of Concrete Surface with Higher Fatty Acids

Barnat-Hunek¹,

Andrzejuk²,

Szafraniec³

et al. 2023

Adv. Sci. Technol. Res. J.

View full text Add to dashboard Cite

The paper's research focuses on the development of novel hydrophobizing agents and the demonstration of their efficiency on a concrete surface. The starting materials are based on natural oils, water-soluble silanes and siloxanes, and/or tap water. Aqueous preparations have qualities that limit the influence of volatile organic compounds (VOCs) on the environment since they solely include biodegradable components. According to research, the higher fatty acids obtained from vegetable oils and derived from the glycerin phase can be employed as a component of concrete hydrophobizing agents while matching the standard requirements for such agents. Analysis of the usage of vegetable oil as a basis ingredient in the manufacturing of industrial substances shows that it is biodegradable with at least 95% certainty. The reference concrete after the frost resistance test showed a weight loss of 1.8%. In the case of hydrophobization, the weight loss was 33.3 to 72% less than the reference samples. In the case of concrete hydrophobized with the glycerin agents, the salt crystallization occurred inside the structure of the material without causing any damage, with the reference concrete showing a weight loss of 0.8%.

show abstract

“…For a number of construction needs, in particular, for the factory production of reinforced concrete building structures and parts, as well as for high-speed construction, fast-hardening cement is required, which is more intense than conventional Portland cement, characterized by increased strength at the initial stage of hardening. Over a long period of time, the growth of strength in it slows down and after a long period of time can reach the strength of ordinary Portland cement [1,2].…”

Section: Introductionmentioning

confidence: 99%

Testing of cement stone modified with an additive based on industrial waste

Bazarbayev¹,

Shakhmov²,

Dyussembinov³

et al. 2022

tbus

View full text Add to dashboard Cite

Nowadays under the conditions of intensively developing construction production, hardening time and strength of Portland cement are becoming more and more relevant research issues of this type of binder. The basic requirements to the cement stated in the normative industry documents are considered. The strength limits of Portland cement of normal and fast-hardening are given. Raw materials for the production of fast-hardening and high-strength cement must be homogeneous and provide a high degree of fineness of the binder to increase its surface area. The production of cement with the addition of microsilica will make it possible to obtain concretes with the given characteristics without additional costs. To describe the methodology of testing cement recommendations of the main regulatory documents operating in Kazakhstan are used. Necessary means and equipment used in the testing laboratory and satisfying the existing standards are listed in a sequential manner. The procedure of preparing standard samples of cement dough is described step by step. The prepared specimens were kept in water at the required temperature regime. Determination of bending and compressive strength was carried out on accredited equipment. Processing of test results of cement samples with and without additives is given. Setting times of cement samples of two compositions were carried out according to the requirements. The dependence of the activity of the cement setting process on its temperature has been determined.

show abstract

Strength and Water-Repelling Properties of Cement Mortar Mixed with Water Repellents

Cited by 13 publications

References 22 publications

Spray Coating of Nanosilicate‐Based Hydrogel on Concrete

Spray Coating of Nanosilicate‐Based Hydrogel on Concrete

Modification of Concrete Surface with Higher Fatty Acids

Testing of cement stone modified with an additive based on industrial waste

Contact Info

Product

Resources

About