superhydrophobic concrete: superhydrophobic admixtures

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SUPERHYDROPHOBIC CONCRETE: Superhydrophobic Admixtures

2014-2-6  Superhydrophobic Admixtures . To create the hydrophobic and superhydrophobic admixtures a water soluble polyvinyl alcohol (PVA) and a polymethyl-hydrogen siloxane oil (PMHS) were used as surfactant and as hydrophobic agent,

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The Development of Hydrophobic and Superhydrophobic ...

2020-10-13  superhydrophobic admixtures to fresh concrete resulting in an air void system with small, well-dispersed air bubbles to provide superior resistance to freezing and thawing. Hydrophobic, over- and super-hydrophobic surface coatings were achieved by the design of hierarchical surfaces tailoring the fiber content, mixture

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SUPERHYDROPHOBIC CONCRETE

2014-2-6  Recent research at UW-Milwaukee offers the next generation of concrete, superhydrophobic engineered cementitious composites (SECC). This newly developed composite is made of cement-based materials with polyvinyl alcohol fibers and superhydrophobic admixtures. This material has exceptional strength and durability, essential in addressing current ...

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SUPERHYDROPHOBIC CONCRETE: The Concept of ...

2014-2-6  The superhydrophobic action is intended to change the volume, size, and distribution of air voids in concrete as well as to reduce the bond with PVA fibers realizing a controlled pull-out behavior. Furthermore, the controlled air void structure results in "preferred" fracture modes. Fig 2.

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Hydrophobic/Superhydrophobic Concrete SpringerLink

2017-6-13  S.W. Muzenski, I. Flores-Vivian, K. Sobolev. The development of hydrophobic and superhydrophobic cementitious composites. in International Conference on the Durability of Concrete Structures, 2014 Google Scholar

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Nano-engineered Superhydrophobic and Overhydrophobic Concrete

Thin layers of such water repellant material can create a strong barrier to water. Another method to improve the durability of concrete is based on the addition of superhydrophobic admixtures of polymethyl hydrosiloxane emulsions and nano particles.

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Hydrophobic/Superhydrophobic Concrete Request PDF

The contact angle of hydrophobic concrete is over 90°, while that of superhydrophobic concrete can exceed 150°. Hydrophobicity/superhydrophobicity of concrete can be achieved by using...

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Super-robust superhydrophobic concrete - Journal of ...

2017-6-5  Comparative robustness tests, including sandpaper abrasion, knife scratch and hammer beat, were performed on commercial superhydrophobic paint + adhesive coatings and our S-concrete, which indicated that our S-concrete had far superior

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Super-Robust Superhydrophobic Concrete

2017-6-5  1 Supplementary Materials Super-Robust Superhydrophobic Concrete Jinlong Song a, b, Danyang Zhao a, b*, Zhengjin Han a, Wei Xu c, Yao Lu d, Xin Liu a, Bo Liu c, Claire J. Carmalt d, Xu Deng e, Ivan P. Parkin d* a Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian 116024, China

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Colorful superhydrophobic concrete coating - ScienceDirect

2021-1-1  Concrete is widely used in architecture because of its advantages such as high strength, low cost, good durability and plasticity. However, due to its hydrophilicity and porous structures, the concrete suffers from damages caused by oxidative corrosion, freezing environment, acid rain, etc. Superhydrophobic coating with excellent water-repellent property has great potential to solve this

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Nano-engineered Superhydrophobic and Overhydrophobic Concrete

Another method to improve the durability of concrete is based on the addition of superhydrophobic admixtures of polymethyl hydrosiloxane emulsions and nano particles. These admixtures can produce a 3-dimensional volume hydrophobization by releasing hydrogen in alkali environments enabling the formation of air voids throughout a cementitious matrix.

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Anti-Icing and De-Icing Superhydrophobic Concrete to ...

These superhydrophobic admixtures were developed and investigated to reduce the ice adhesion to concrete surfaces. In addition, the proposed method involves the engineering of the hierarchical structure for concrete wearing surface by optimization of aggregates and the use of fibers.

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Nano-engineered Superhydrophobic and Overhydrophobic ...

Another method to improve the durability of concrete is based on the addition of superhydrophobic admixtures of polymethyl hydrosiloxane emulsions and nano particles.

Get price

Super-robust superhydrophobic concrete - Journal of ...

2017-6-5  Steel reinforced concrete is often used in buildings, roads and bridges, however, freeze–thaw damage and steel corrosion pose threats to the strength of concrete. Furthermore, ice formation on concrete road-surfaces greatly increases injury and fatality rates. Superhydrophobic

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Hydrophobic engineered cementitious composites for

2015-3-1  In fiber reinforced concrete, superhydrophobic modification can be used to change volume, size, and distribution of air voids in the concrete, as well as reduce the bond with PVA fibers to realize a controlled pull-out behavior . These engineered flaws created by hydrophobic admixtures can initiate the formation of cracks within the high ...

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Super-Robust Superhydrophobic Concrete

2017-6-5  1 Supplementary Materials Super-Robust Superhydrophobic Concrete Jinlong Song a, b, Danyang Zhao a, b*, Zhengjin Han a, Wei Xu c, Yao Lu d, Xin Liu a, Bo Liu c, Claire J. Carmalt d, Xu Deng e, Ivan P. Parkin d* a Key Laboratory for Precision and Non-Traditional Machining Technology of Ministry of Education, Dalian University of Technology, Dalian 116024, China

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Superhydrophobic rice husk ash coating on concrete ...

2017-7-30  The silica particles in rice husk ash are useful to create the roughness required by the superhydrophobic coating on concrete. The superhydrophobic coating was prepared using rice husk ash dispersed in the ethanolic solution containing fluoroalkyl silane, 1H,1H,2H,2H-perfluorodecyl triethoxy silane (2 vol.%).The ash solution was sprayed on a layer of commercial adhesive coated on the concrete.

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hydrophobic hydrophilic admixtures – Concrete Products

2020-6-25  Sika answers permeability with hydrophobic hydrophilic admixtures June 25, 2020 Concrete News The introduction of a powdered, concrete plant-dispensed agent positions Sika Corp. as reportedly the only admixture producer to offer the two core permeability reducing technologies: hydrophilic crystalline and hydrophobic pore blocking.

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15 Types of Admixtures Used in Concrete - The Constructor

Various types of admixtures are used in concrete to enhance the performance of concrete. Concrete admixture is defined as the material other than the aggregate, water and cement added to the concrete. Types of Concrete Admixtures Concrete admixtures

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Concrete Admixtures - North America

2021-8-15  Concrete Admixtures Our technologies add value and reliability to concrete production and construction. Master Builders Solutions provides a complete portfolio of high-quality admixtures that improve the placing, pumping, finishing, and long-term performance of concrete

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Anti-icing and de-icing superhydrophobic concrete to ...

2021-8-9  These superhydrophobic admixtures were developed and investigated to reduce the ice adhesion to concrete surfaces. In addition, the proposed method involves the engineering of the hierarchical structure for concrete wearing surface by optimization of aggregates and the use of fibers.

Get price

Hydrophobic engineered cementitious composites for

2015-3-1  In fiber reinforced concrete, superhydrophobic modification can be used to change volume, size, and distribution of air voids in the concrete, as well as reduce the bond with PVA fibers to realize a controlled pull-out behavior . These engineered flaws created by hydrophobic admixtures can initiate the formation of cracks within the high ...

Get price

The Development of Hydrophobic and Superhydrophobic ...

The spray-coated andadmixed concrete can be used to form superhydrophobic surfaces on concrete structures to reduce water ab-sorption and increase the durability of cement mortar. View Show abstract

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Green fabrication of mechanically stable superhydrophobic ...

Superhydrophobic concrete with anti-corrosion property is a potential candidate for mitigating marine corrosion. Environmental friendliness and mechanical stability are important factors to be considered in the application of superhydrophobic concrete. Here, a green method is proposed to fabricate superhydrophobic concrete using nontoxic ...

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The Development of Hydrophobic and Superhydrophobic ...

The Development of Hydrophobic and Superhydrophobic Cementitious Composites. Freezing and thawing of water in saturated concrete induces stresses, cracks, spalling, and eventually allows chlorides, sulphates and other ions to penetrate through the porous space of concrete causing the corrosion and ultimately structural failure.

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Use of Hydrophobic Agents as Concrete Admixtures

2003-6-1  Date: 6/1/2003. Abstract: The environmental attack on reinforced concrete structures can he reduced by preventing water penetration into the concrete pores using hydrophobic agents as concrete admixtures. In order to point out problems related to their practical use, the effectiveness of hydrophobic admixture on cement pastes with different w/c ...

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Colorful superhydrophobic concrete coating,Chemical ...

2020-7-25  Concrete is widely used in architecture because of its advantages such as high strength, low cost, good durability and plasticity. However, due to its hydrophilicity and porous structures, the concrete suffers from damages caused by oxidative corrosion, freezing environment, acid rain, etc. Superhydrophobic coating with excellent water-repellent property has great potential to solve this

Get price

Admixtures for Concrete - Memphis

2021-8-9  Admixtures for Concrete Fig. 6-1. Liquid admixtures, from left to right: antiwashout admixture, shrinkage reducer, water reducer, foaming agent, corrosion inhibitor, and air-entraining admixture. (69795) Despite these considerations, it should be borne

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Types of Admixtures - idc-online

2019-2-4  Portland cement concrete and in some cases reduce the material cost of concrete. Examples are Fly ash Silica Fume Rice Husk Ash Metakaolin Pozzolanic Action: The additive act in three ways 1. Filler 2. Nucleating 3. Pozzolanic 1. Filler: These additives/admixtures are finer than cement, so when added to concrete they occupy the small

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Seven Must-Use Concrete Admixtures (Additives)

2021-6-2  Concrete admixtures can improve concrete quality, manageability, acceleration, or retardation of setting time, among other properties that could be altered to get specific results. Many, not to say all, concrete mixes today contain one or more concrete admixtures

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