Influence of Acrylic Emulsion on Polymer-Cement Waterproof Coating

Jiang, Yong Jing; Li, Lei; Wang, Hong Song; Wang, Rui; Tian, Qinghua

doi:10.4028/www.scientific.net/amr.1129.263

Cited by 11 publications

(5 citation statements)

References 11 publications

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“…Acrylic aided a dual purpose: it enhanced adhesion between Portland cement and the gypsum rock, and reduced the likelihood of shrinkage and grout cracking by creating a more flexible structure with lower stiffness, this result confirmed by Mullenax 55 and Akinyemi and Omoniyi 56 . Additionally, as reported by Jiang et al 57 , acrylic polymer not only impart flexibility to polymer cement mixture but also function as cementitious phases.…”

Section: Resultsmentioning

confidence: 73%

Chemical improvement of soluble rocks: Foundation of Mosul Dam as case study

Aziz,

Soroush,

Fattahi

et al. 2024

Sci Rep

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The dissolution of soluble rocks (gypsum/anhydrite) beneath the Mosul Dam by water seepage has been observed upon the initial impoundment; consequently, several sinkholes have been manifested in the vicinity of the dam site. Traditional grouting has been envisaged as a potential remedy; however this measure has not eradicated the problem. The main purpose of this study is to overcome the solubility of the gypsum/anhydrite rocks using chemical grouts. Rock samples were acquired from the Fatha Formation outcrop and problematic layers of brecciated gypsum situated at varying depths beneath the Mosul Dam. Two commercially available liquid polymers, polyurethane (PU) and a mixture of acrylic and cement (ARC) were used to investigate their sealing performance in halting of the solubility of the rocks (gypsum/anhydrite). To simulate the dissolution phenomenon under the influence of artificial hydraulic pressure of the dam and the water flow in its abutments, two distinct laboratory models were devised. The outcomes from the experimental study on both untreated and treated samples revealed that the acrylic-cement composite (ARC) and polyurethane (PU) are influential polymers in halting the solubility of the gypsum rock samples under both factors of water pressure and high-velocity water flow.

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Section: Resultsmentioning

confidence: 73%

Chemical improvement of soluble rocks: Foundation of Mosul Dam as case study

Aziz,

Soroush,

Fattahi

et al. 2024

Sci Rep

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“…The most favourable water-resistant characteristics were demonstrated for coatings with 0.3% of the dispersive additive. A decrease in the P/C indicator contributes to a drop in the value of the coating elongation at break, though the stress value goes up initially to drop significantly after a while [22]. For the P/C indicator value of 0.12, the elongation at break remains at ≥30%.…”

Section: The Tensile Adhesion Strength Values Inmentioning

confidence: 96%

Experimental Investigation of Adhesion Failure between Waterproof Coatings and Terrace Tiles under Usage Loads

Francke

Piekarczuk

2020

Buildings

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This paper analyses the mechanism of the loss of functional properties of water-impermeable products used under ceramic tiles bonded with adhesives. Recorded damages were caused by selected ageing factors and were measured by the loss of adhesion of individual layers of the set. The analyzed phenomenon is found mainly on terraces and balconies located in a mid-European transitional climate, i.e., exposed to temperatures passing through 0 °C for three seasons a year. The tests reflected the action of three main functional factors, i.e., temperatures, water and freeze/thaw cycles. Tested waterproof coatings were grouped into three types, i.e., dispersion, cementitious and reaction resin-based products. Research kits consisted of liquid-applied water-impermeable products laid on a concrete substrate, adhesives and tiles. Comparing the effects of the action of the above-mentioned ageing factors revealed that water has the greatest impact on the reduction of the tensile adhesion strength of such sets. The adhesion of waterproof coatings to the concrete substrate showed higher values than the adhesion between the waterproof coating and the tile adhesive layers, regardless of the coating material. Both for samples not exposed to ageing factors, and for those exposed to such impacts, failure usually occurred in the adhesive layer or between the tile adhesive and the waterproof coating, without damaging the waterproof layer. The loss of adhesion of finishing layers to the substrate was not accompanied by a loss of tightness of the waterproof coating. The impact of negative water ageing was particularly destructive on the adhesion of cement-based tile adhesives to waterproof coatings made of polymer with a water dispersion of absorbability above 7% (V/V). There was no correlation among the results of adhesion of the finishing layers to the waterproofing layer after the action of the three ageing factors, i.e., water contact, elevated temperature and freeze/thaw cycles.

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“…Among these cross-linkers, DAAM/ADH is of particular interest to many researchers, − as this keto-hydrazide cross-linking chemistry allows the generation of three-dimensional (3D) polymeric networks at ambient temperature, providing materials with enhanced mechanical properties. To date, aqueous dispersions containing DAAM/ADH have been employed in a myriad of applications, including coatings, , adhesives, , cement modification, and many others.…”

Section: Introductionmentioning

confidence: 99%

Nanoparticle Surface Cross-Linking: A Universal Strategy to Enhance the Mechanical Properties of Latex Films

Fan

Putera

et al. 2022

Macromolecules

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Keto-hydrazide cross-linking chemistry between diacetone acrylamide (DAAM) and adipic acid dihydrazide (ADH) has been widely applied in conventional emulsion polymerization to render materials with specific chemical and physical properties. However, significant drawbacks are usually associated with the conventional process, such as the migration of low-molar-mass surfactants, and the low cross-linking efficiency due to the random distribution of the cross-linkers throughout the nanoparticles. We demonstrate here the concept of surface crosslinking of latexes in a RAFT-mediated surfactant-free procedure that overcomes the migration of surfactants while improving the cross-linking efficiency of latexes. Specifically, the "surface crosslinking" here refers to the cross-linking of colloidal particles' surfaces during the film formation process. First, an amphiphilic RAFT agent with the incorporation of a cross-linking unit (DAAM) was designed and synthesized; the following controlled emulsion polymerizations provide a series of surfactant-free latexes with excellent colloidal stabilities, high solid contents (>40.0 wt %), and a size range of 150−250 nm. To access RAFT latexes with different cross-linking degrees and mechanisms, amphiphilic RAFT agents with different units of cross-linking component (DAAM) were designed and implemented for the controlled emulsion polymerization of styrene and n-butyl acrylate. Next, the surface crosslinkable and randomly cross-linkable RAFT latexes and corresponding films were prepared. It was found that the surface cross-linked films exhibited not only improved Young's modulus and storage modulus but also better solvent resistance compared to the control group with DAAM units randomly distributed throughout the particle systems. Remarkably, it was noticed that the surface crosslinking process can simultaneously increase the strain at break and ultimate stress, and this is the first observation of such a phenomenon in DAAM/ADH cross-linked latex films. Overall, this study represents the first attempt that combines surfactant-free RAFT-mediated emulsion polymerization with the surface cross-linking chemistry to produce cohesive films with enhanced and tunable mechanical properties. This universal synthetic strategy is applicable to a broad range of commercial monomers and can be used as a platform technology for advanced industrial applications.

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Influence of Acrylic Emulsion on Polymer-Cement Waterproof Coating

Cited by 11 publications

References 11 publications

Chemical improvement of soluble rocks: Foundation of Mosul Dam as case study

Chemical improvement of soluble rocks: Foundation of Mosul Dam as case study

Experimental Investigation of Adhesion Failure between Waterproof Coatings and Terrace Tiles under Usage Loads

Nanoparticle Surface Cross-Linking: A Universal Strategy to Enhance the Mechanical Properties of Latex Films

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