Detailing of concrete-to-concrete interfaces for improved ...

Abstract. Recent research has shown that reinforced concrete (RC) beams with concrete-to-concrete casting interfaces where plastic hinges are likely to develop, may experience reduced ductility in comparison to similar structural elements casted at once, due to a potential shear slippage along the casting interfaces.

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ESCS Aggregate/Cement Interface - ESCSI

2021-8-17  Core samples taken from hulls of 80-year-old lightweight concrete ships as well as 40 to 50-year-old lightweight concrete bridges reveal that the concrete has a dense contact zone at the lightweight aggregate/cement matrix interface. This zone has very low levels of microcracking throughout the cement mortar matrix (Sturm et al. 1999).

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(PDF) Cement Interfaces: Current Understanding,

Cement Interfaces: Current Understanding, Challenges, and Opportunities. Ozge Heinz * and Hendrik Heinz* 1 Department of Chemical and Biological Engineering, University of Colorado Boulder .

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A cement paste–tail sealant interface modified with a ...

The enhanced waterproofing performance of the cement–tail sealant interface modified with the silane agent was confirmed by its hydrophobicity (i.e. reduced wetting ability) and reduced permeability, which was evaluated by static water-contact angle and impermeability pressure measurements. The processes underlying the enhanced waterproofing ...

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Characterization of the Microstructure of the Cement ...

2021-6-16  Integrity of the cement/casing interface is an essential element of establishing an effective barrier system in cased and cemented wellbores. Failure to establish and maintain an effective barrier can result in negative environmental and economic impacts, such as leakage of formation fluids into the environment or loss of production and costly remediation.

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Study on the Unhydrated Cement Grain/C-S-H Gel

Investigation at micro- and nano-scale is beneficial for the fundamental study of cement-based material as an extremely complex composite. This paper presents a preliminary exploration on the unhydrated cement grain/ C-S-H gel interface using nano-scratch technique. By comprehensive analysis of the penetration depth, the coefficient of friction, and the elastic deformation ratio, the ...

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(PDF) Cement interface temperature in hip arthroplasty

The temperature was measured using thermocouples in the bone-cement interface during cement curing in 30 total hip replacement operations. A modern technique was used, including lavage and ...

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Criterion Classic Stones Summary - Interface

Polished Cement, Criterion Classic Stones, Interface, Inc. is a global commercial flooring company with an integrated collection of carpet tiles and resilient flooring,

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Interface - 办公室地毯,方块地毯,酒店地毯,LVT弹性地板 ...

The Interface Story 主菜单 细分市场 商业办公 教育机构 医疗卫生 酒店娱乐 零售行业 Floors made for learning ... A003-02 Cool Polished Cement A003-04 Emperador Gray A003-08 Light Concrete A003-09 Medium A003-02 高精度图片 ↓ 50cm X ...

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A cement paste–tail sealant interface modified with a ...

The enhanced waterproofing performance of the cement–tail sealant interface modified with the silane agent was confirmed by its hydrophobicity (i.e. reduced wetting ability) and reduced permeability, which was evaluated by static water-contact angle and impermeability pressure measurements. The processes underlying the enhanced waterproofing ...

Get Price

Characterization of the Microstructure of the Cement ...

2021-6-16  Integrity of the cement/casing interface is an essential element of establishing an effective barrier system in cased and cemented wellbores. Failure to establish and maintain an effective barrier can result in negative environmental and economic impacts, such as leakage of formation fluids into the environment or loss of production and costly remediation.

Get Price

A cement paste–tail sealant interface modified with a ...

Compared to cement grout sample, the cement–tail sealant interface sample is denser and smoother, and its surface seems covered with a film of gelatinous materials, which indicated the molecules of modified tail sealant migrated into cement grout and formed hydrophobic barrier on the surface of cement

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Effects of Cement–Polymer Interface Properties on ...

cement-based composites, cement material and chemical composi-tionsneedtobecharacterized,wellunderstood,andthenimproved. In portland cement, the raw materials are limestone and clay. Hence, a typical composition of portland cement is approximately 67% calcium oxide (CaO) and 22% silicon dioxide (SiO2), with mainly alite and belite molecules.

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The cement matrix and the steel/cement paste interface in ...

The cement matrix and the steel/cement paste interface in reinforced mortar, containing the waste 'red'mud' as 20% cement replacement. / Koleva, DA; van Breugel, K; Boshkov, N. Proceedings of the 12th international conference on mechanics and technology of composite materials. ed. / N Barovsky.

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Study on the Unhydrated Cement Grain/C-S-H Gel

Investigation at micro- and nano-scale is beneficial for the fundamental study of cement-based material as an extremely complex composite. This paper presents a preliminary exploration on the unhydrated cement grain/ C-S-H gel interface using nano-scratch technique. By comprehensive analysis of the penetration depth, the coefficient of friction, and the elastic deformation ratio, the ...

Get Price

CEMENT PASTE AGGREGATE INTERFACE

properties which impact on the performance of mortars and concrete. Farran (1) was among the first to note that the interface formed between aggregate and '_ulk" cement paste was not sharp, and that the cement paste in contact with the a_m'egate differed from the '_ulk" cement paste. Barnes et al. (2,3) and more recently Yuan and Odler

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Fracture Mechanisms of Polymer Cement Mortar: Concrete ...

Laboratory tests, including splitting tension, three-point bending, and direct shear tests, were conducted on polymer cement mortar (PCM)-concrete composite specimens with various degrees of interface roughness (R a).The PCM-concrete bond strength, fracture energy, and fracture surface were investigated qualitatively.

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Challenges in the Measurement and Interpretation of ...

2021-6-18  Leakage of wells along the interface between cement and steel is one of the primary failure mechanisms for loss of zonal isolation (e.g., Bellabarba et al. 2008; Bois et al. 2011). While cement bond logs have been used for many years (Boyd et al. 2006) to characterize the possible existence of a gap (or microannulus) between steel and cement ...

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Unraveling disadhesion mechanism of epoxy/CSH

2021-5-22  Unraveling disadhesion mechanism of epoxy/CSH interface under aggressive Cement and Concrete Research ( IF 10.933) Pub Date : 2021-05-21, DOI: 10.1016/j.cemconres.2021.106489 Dongshuai Hou, Qingrui Yang, Pan Wang, Zuquan Jin, Muhan Wang, Yue Zhang, Xinpeng Wang

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The cement matrix and the steel/cement paste interface in ...

The cement matrix and the steel/cement paste interface in reinforced mortar, containing the waste 'red'mud' as 20% cement replacement. / Koleva, DA; van Breugel, K; Boshkov, N. Proceedings of the 12th international conference on mechanics and technology of composite materials. ed. / N Barovsky.

Get Price

ESCS Aggregate/Cement Interface - ESCSI

2021-8-17  Core samples taken from hulls of 80-year-old lightweight concrete ships as well as 40 to 50-year-old lightweight concrete bridges reveal that the concrete has a dense contact zone at the lightweight aggregate/cement matrix interface. This zone has very low levels of microcracking throughout the cement mortar matrix (Sturm et al. 1999).

Get Price

Effects of Cement–Polymer Interface Properties on ...

cement-based composites, cement material and chemical composi-tionsneedtobecharacterized,wellunderstood,andthenimproved. In portland cement, the raw materials are limestone and clay. Hence, a typical composition of portland cement is approximately 67% calcium oxide (CaO) and 22% silicon dioxide (SiO2), with mainly alite and belite molecules.

Get Price

A cement paste–tail sealant interface modified with a ...

Compared to cement grout sample, the cement–tail sealant interface sample is denser and smoother, and its surface seems covered with a film of gelatinous materials, which indicated the molecules of modified tail sealant migrated into cement grout and formed hydrophobic barrier on the surface of cement

Get Price

CEMENT PASTE AGGREGATE INTERFACE

properties which impact on the performance of mortars and concrete. Farran (1) was among the first to note that the interface formed between aggregate and '_ulk" cement paste was not sharp, and that the cement paste in contact with the a_m'egate differed from the '_ulk" cement paste. Barnes et al. (2,3) and more recently Yuan and Odler

Get Price

"High Density Cement-Rock Interface Characterization" by ...

The cement-rock interface is an area of vulnerability with a pathway that provides possible routes for leakage out into the wellbore environment and in the proximity of the seals. Therefore, this plugging and abandonment process entails the need for understanding the bonding between subsurface rocks and cement. The goal of this research work ...

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Study on the Unhydrated Cement Grain/C-S-H Gel

Investigation at micro- and nano-scale is beneficial for the fundamental study of cement-based material as an extremely complex composite. This paper presents a preliminary exploration on the unhydrated cement grain/ C-S-H gel interface using nano-scratch technique. By comprehensive analysis of the penetration depth, the coefficient of friction, and the elastic deformation ratio, the ...

Get Price

Isolation Scanner Cement Evaluation Service Schlumberger

Isolation Scanner cement evaluation service combines pulse-echo technology with ultrasonic flexural wave imaging to accurately evaluate almost any type of cement by differentiating low-density solids from liquids around the entire casing circumference, along with pinpointing channels and wear.

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Shear strength of concrete interfaces with infra ...

2017-10-26  The interfaces used are classified in the Eurocode as smooth, rough, and indented. 1 To obtain a smooth interface, the concrete was carefully polished with a conventional concrete trowel. To obtain a rough surface, a rake with a tine spacing of 31 mm was employed to create notches in the concrete of about 5 mm depth (Figure 4 a,b).

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混凝土-混凝土层间界面的性能及在组合混凝土 结构中的应用 ...

2021-4-9  混凝土-混凝土层间界面的性能及在组合混凝土 结构中的应用评述 Review on Behavior of Concrete-concrete Interface and Its Application in Composite Concrete Structures 投稿时间:2021-04-09

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