sand cement interface

Sand–concrete interface response: The role of surface

01/12/2019· Sand–concrete interface direct shear tests were used to investigate the effects of surface roughness, surface waviness, mean sand diameter and relative density on interface strength and behavior under different confinement conditions. Extreme concrete surface textures, including smooth, rough and rough–wavy textures, were reproduced.

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Shear behaviour of sand-concrete interface with side post

01/12/2020· A total of 48 groups of self-developed, large-scale direct shear experiments were conducted to investigate the shear behaviour of sand-concrete interface with side-grouting, focusing on the effect of soil stress unloading and the on-site roughness measurements of bored pile.

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(PDF) Shear behaviour of sand-concrete interface with side

A total of 48 groups of self-developed, large-scale direct shear experiments were conducted to investigate the shear behaviour of sand-concrete interface with side-grouting, focusing on the effect...

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Effect of grout conditions on the mechanical behaviors of

20/05/2020· The direct shear test results show that the mechanical behavior of the grout sand-concrete interface is mainly improved by improving the cohesive force of the interface when the grouting pressure is lower, and the grout cement improves the shear behavior of the interface by improving both the interface cohesive force and friction angle for the high grouting pressure.

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Study on Soil-Structure Interface Properties

consists of sand in top box and clay in bottom box. The geometry, deformed mesh, phreatic line will be similar only. The properties for sand, clay, concrete is given. The fourth model consists of concrete –geo grid interface. Concrete is placed in top box and clay is placed in bottom box, in between this two halves a geo grid material is placed.

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Determination of soil shear properties on a soil to

31/08/2017· In an experimental study of interface behavior between composite piles and two sands (density sand and model sand), by the US Federal Highway Administration [ 18] the surface of concrete piles used were profiled with Taylor-Hobson Talysurf stylus profilometer, and roughness parameters were obtained which includes, maximum peak-to-valley height (R t), average mean line spacing (S m), and

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What Are the Mix Ratios for Cement and Sand?

04/08/2015· The basic mix ratio for concrete is one part water, two parts cement and three parts sand. An alternative ratio is one part cement, two parts sand and three parts gravel with enough water added until the mixtures reaches the consistency of thick mud. Lime is also a common additive to the mix.

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Shear behaviour of sand-concrete interface with side post

Technical Paper Shear behaviour of sand-concrete interface with side post-grouting considering the unloading effect Yi Feia, Noriyuki Yasufukub, Chunfeng Zhaoa,⇑, Cheng Zhaoa, Kai Xua aDept. of

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(PDF) Shear behaviour of sand-concrete interface with side

A total of 48 groups of self-developed, large-scale direct shear experiments were conducted to investigate the shear behaviour of sand-concrete interface with side-grouting, focusing on the effect...

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The Degenerate Mechanism of Sand-Concrete Interface under

of concrete-sand interface under different initial normal stress and shear displacement amplitude show similar trends. The shear stress increases with the increase of shear displacement increase in the initial stage, and decreases after the shear stress reach the peak, but it becomes gentle when deceases to a certain value. This phenomenon is shear softening. It is shown that the initial

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The Mechanism of Interface Dilatancy of Cement Mortar

08/09/2020· Abstract In this paper, the mechanism of the interface dilatancy of cement mortar rockbolts is studied based on the phenomenon of splitting failure of samples with a high sand content in the grouting material in laboratory tests. A conceptual model of the interface layer is used to explain the dilatancy mechanism of the interface.

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Study on the Secondary Interface in Microstructure of the

The superfine sand concrete application in our country has a history of more than half a century. Although we have a certain understanding about the superfine sand concrete, there are few studies of superfine sand concrete interface. This experiment made up different water-cement ratio superfine sand concrete, and used scanning electron microscope to observe the secondary interface structure

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(PDF) Concrete-Sand Interface in Direct Shear Tests: Volume 1

PDF On Jan 1, 2018, Zihao Jin and others published Concrete-Sand Interface in Direct Shear Tests: Volume 1 Find, read and cite all the research you need on ResearchGate. Chapter PDF Available

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Sand to Concrete Interface Response to Complex Load Paths

01/07/2008· The large displacement shear box (LDSB) allows testing of interfaces as large as 711 by 406 mm (28 by 16 in.) with maximum interface displacements of 305 mm (12 in.). This device has been used to investigate the response of a variety of interfaces, including clay-geomembrane interfaces for which large displacements are important.

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Typical Interface Friction Angles CivilEngineeringBible

Interface Meterials Interface Friction Angle (degree) Mass concrete against: clean sound rock: 25: clean gravel, gravel-sand mixtures: 29-31: clean fine to medium sand, silty medium to coarse sand, silty or clayey gravel: 24-29: clean fine sand, silty or clayey fine to medium sand: 19-24: fine sandy silt, nonplastic silt: 17-19: Formed concrete

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Study on Soil-Structure Interface Properties

consists of sand in top box and clay in bottom box. The geometry, deformed mesh, phreatic line will be similar only. The properties for sand, clay, concrete is given. The fourth model consists of concrete –geo grid interface. Concrete is placed in top box and clay is placed in bottom box, in between this two halves a geo grid material is placed.

Get Price

Interface Bond Characterization between Fiber and

04/10/2015· The composite properties of the interface between the fiber and cement matrix have been examined in many studies found in the literature; these properties include composite strength, fatigue, ductility, energy absorption, and interface failure mode [ 3 ].

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The Degenerate Mechanism of Sand-Concrete Interface under

of concrete-sand interface under different initial normal stress and shear displacement amplitude show similar trends. The shear stress increases with the increase of shear displacement increase in the initial stage, and decreases after the shear stress reach the peak, but it becomes gentle when deceases to a certain value. This phenomenon is shear softening. It is shown that the initial

Get Price

Typical Interface Friction Angles CivilEngineeringBible

Interface Meterials Interface Friction Angle (degree) Mass concrete against: clean sound rock: 25: clean gravel, gravel-sand mixtures: 29-31: clean fine to medium sand, silty medium to coarse sand, silty or clayey gravel: 24-29: clean fine sand, silty or clayey fine to medium sand: 19-24: fine sandy silt, nonplastic silt: 17-19: Formed concrete

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Sand to Concrete Interface Response to Complex Load Paths

01/07/2008· The large displacement shear box (LDSB) allows testing of interfaces as large as 711 by 406 mm (28 by 16 in.) with maximum interface displacements of 305 mm (12 in.). This device has been used to investigate the response of a variety of interfaces, including clay-geomembrane interfaces for which large displacements are important.

Get Price

Study on the Secondary Interface in Microstructure of the

The superfine sand concrete application in our country has a history of more than half a century. Although we have a certain understanding about the superfine sand concrete, there are few studies of superfine sand concrete interface. This experiment made up different water-cement ratio superfine sand concrete, and used scanning electron microscope to observe the secondary interface structure

Get Price

Experimental Investigation and Constitutive Modeling of

05/05/2019· This study aimed to investigate the behavior of the interface between the cement-grouted materials (soil nails) and sandy soil using direct shear test apparatus, make a comparison between the sand–sand interface and grout–sand interface, and calibrate an interface model to be used in simulations of soil-nailing systems. The effect of the water:cement ratio of the grout and the relative

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Experimental Investigation and Constitutive Modeling of

05/05/2019· This study aimed to investigate the behavior of the interface between the cement-grouted materials (soil nails) and sandy soil using direct shear test apparatus, make a comparison between the sand–sand interface and grout–sand interface, and calibrate an interface model to be used in simulations of soil-nailing systems.

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The Interfacial Transition Zone (ITZ) Between Cement Paste

This is the region of the cement paste around the aggregate particles, which is perturbed by the presence of the aggregate. Its origin lies in the packing of the cement grains against the much larger aggregate, which leads to a local increase in porosity and predominance of smaller cement particles in this region.

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Interface Bond Characterization between Fiber and

04/10/2015· The composite properties of the interface between the fiber and cement matrix have been examined in many studies found in the literature; these properties include composite strength, fatigue, ductility, energy absorption, and interface failure mode [ 3 ].

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Vinyl Floor Tiles Vinyl Flooring Interface

A00303 Warm Polished Cement Interface carpet tiles have met their perfect match. Our luxury vinyl tile Collection, Level Set™ is inspired by some of our favourite elements. These designs are a sleek, sophisticated addition to any space and can be paired alongside your favourite modular carpet tiles for harmonious beauty and unique style. But our LVT flooring is much more than a design

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Influence of Pore Structure on Compressive Strength of

16/03/2014· The porosity of the manufactured sand mortar is higher than that of natural sand at the same mix proportion; on the contrary, the probable pore size and threshold radius of manufactured sand mortar are finer. Besides, the probable pore size and threshold radius increased with increasing water to cement ratio and sand to cement ratio.

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