us4953752a concrete and mortar distribution process and

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US4953752A - Concrete and mortar distribution

Process and apparatus are provided to distribute specified, premixed quantities of dry mortar mix and cement to a construction site. Bulk bags and a hopper apparatus are transported to the construction site and utilized with a forklift and a mixer device. The hopper apparatus is adjustably assembled and is constructed and arranged to be hand operable to efficiently meter homogeneous ...

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Concrete and mortar distribution process and

Concrete and mortar distribution process and apparatus . United States Patent 4953752 . Abstract: Process and apparatus are provided to distribute specified, premixed quantities of dry mortar mix and cement to a construction site. Bulk bags and a hopper apparatus are transported to the construction site and utilized with a forklift and a mixer ...

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Concrete and mortar distribution process and

1990-6-28  Concrete and mortar distribution process and apparatus . United States Patent 4997284 . Abstract: Process and apparatus are provided to distribute specified, premixed quantities of dry mortar mix and cement to a construction site. Bulk bags and a hopper apparatus are transported to the construction site and utilized with a forklift and a mixer ...

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Correlation between mortar and concrete behavior

2015-12-1  The h of mortar and concrete shows a tendency to increase with the increase in diatomite content but, while the yield stress increases in the mortars, in concrete g decreases for amounts of diatomite higher than 8%, due to the increase of fine particles in the system (Fig. 24, Fig. 25). Download : Download full-size image; Fig. 24.

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Separation and Quantification of Attached Mortar in ...

2016-11-22  Construction and demolition waste stream has generated news materials that may be re-introduced into new concrete, e.g. as recycled aggregates. The specific feature of recycled concrete aggregates is the presence of hardened mortars influencing their behaviour. This study aims to distinguish processes that allow the complete separation and quantification of attached mortar. An

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Ionic transport features in concrete composites

2018-1-1  The service life of concrete-based infrastructure and buildings is seriously shortened due to the chloride-induced durability problems. In order to clarify the transport mechanism associated with the response of inclusion structures, this paper presents a numerical study on the influence caused by morphology and heterogeneity of individual phases, in which the concrete is treated as a three ...

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Experimental and numerical study on chloride

2020-10-20  The chloride transport model also includes two processes of drying and wetting: in the drying process, some chloride ions will migrate to the surface layer with the evaporation of water, but they will not leave the mortar, so the boundary condition of the bottom surface in the drying process is a flux free boundary; while in the wetting process ...

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The fractal characteristics of pore size distribution in ...

2019-11-20  The mortar shows the secondary peak in the transition pore region, which means that the mortar pore size distribution in the transition area is relatively complex.

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Fundamental Properties of Magnesium Phosphate

2016-9-26  Fundamental properties of magnesium phosphate cement (MPC) were investigated in this paper. The setting time and compressive and bond (i.e., flexural and tensile bond) strengths were measured to assess the applicability, and hydration product was detected by the X-ray diffraction. The specimens were manufactured with magnesia and potassium dihydrogen phosphate

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Experimental Study on the Dynamic Mechanical

2020-12-24  Rock bursts are typically accompanied by multiple shocks. In order to explore the dynamic characteristics of filling materials in rock burst roadways, we employ the split Hopkinson pressure bar (SHPB) test to analyze the dynamic mechanical response of mortar and concrete under cyclical impact. The SHPB test results of the large-size specimen indicate the improvement in the waveform shape

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Correlation between mortar and concrete behavior

2015-12-1  The h of mortar and concrete shows a tendency to increase with the increase in diatomite content but, while the yield stress increases in the mortars, in concrete g decreases for amounts of diatomite higher than 8%, due to the increase of fine particles in the system (Fig. 24, Fig. 25). Download : Download full-size image; Fig. 24.

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Capillary transport in mortars and concrete -

1997-5-1  Clearly, an understanding of moisture transport in concrete and mortar is important to estimate their service life as a building material and to improve their quality. 747 748 N.S. Martys and C.F. Ferraris Vol. 27, No. 5 Presently, the only standard test for the ingress of chlorides into concrete which, at least in part, depends on capillary ...

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Evaluation of mortar properties by combining

2020-12-1  Concrete and brick wastes are used as a RFA by substituting NFA in the mortar with different percentages 15 %, 30 %, 45 %, and 90 %. Several tests have been carried out, in order to assess the effect of substituting NFA by recycled ones on the behavior of cement mortar.

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Influence of Cement Type on Stability of Concrete

The continuous tightening of emission limits for the production of harmful substances into the air and the rising price of emission allowances gradually force construction material producers to limit the use of binders with a high content of Portland clinker. In the production of concrete, this is achieved by using admixtures, which make it possible to reduce Portland cement doses.

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Biological Self-Healing of Cement Paste and Mortar

Crack formation in concrete is one of the main reasons for concrete degradation. Calcium alginate capsules containing biological self-healing agents for cementitious materials were studied for the self-healing of cement paste and mortars through in vitro

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Separation and Quantification of Attached Mortar in ...

2016-11-22  Construction and demolition waste stream has generated news materials that may be re-introduced into new concrete, e.g. as recycled aggregates. The specific feature of recycled concrete aggregates is the presence of hardened mortars influencing their behaviour. This study aims to distinguish processes that allow the complete separation and quantification of attached mortar. An

Get price

The fractal characteristics of pore size distribution in ...

2019-11-20  The mortar shows the secondary peak in the transition pore region, which means that the mortar pore size distribution in the transition area is relatively complex.

Get price

Fundamental Properties of Magnesium Phosphate

2016-9-26  Fundamental properties of magnesium phosphate cement (MPC) were investigated in this paper. The setting time and compressive and bond (i.e., flexural and tensile bond) strengths were measured to assess the applicability, and hydration product was detected by the X-ray diffraction. The specimens were manufactured with magnesia and potassium dihydrogen phosphate

Get price

Bending the cost curve in brick-and-mortar retail

2020-1-28  Brick-and-mortar retail will continue being challenged to deliver on multiple fronts at once, including customer experience, omnichannel services, and cost excellence. While initially impactful, traditional lean levers employed by store operations limit the scope of opportunity by ignoring 50 percent of cost controlled by other functions ...

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Brick-and-Mortar Definition - Investopedia

Brick And Mortar: Term: Brick and mortar is a traditional street-side business that deals with its customers face-to-face in an office or store that the business owns or rents. The local grocery ...

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Capillary transport in mortars and concrete -

1997-5-1  Clearly, an understanding of moisture transport in concrete and mortar is important to estimate their service life as a building material and to improve their quality. 747 748 N.S. Martys and C.F. Ferraris Vol. 27, No. 5 Presently, the only standard test for the ingress of chlorides into concrete which, at least in part, depends on capillary ...

Get price

Evaluation of mortar properties by combining

2020-12-1  Concrete and brick wastes are used as a RFA by substituting NFA in the mortar with different percentages 15 %, 30 %, 45 %, and 90 %. Several tests have been carried out, in order to assess the effect of substituting NFA by recycled ones on the behavior of cement mortar.

Get price

Influence of Cement Type on Stability of Concrete

The continuous tightening of emission limits for the production of harmful substances into the air and the rising price of emission allowances gradually force construction material producers to limit the use of binders with a high content of Portland clinker. In the production of concrete, this is achieved by using admixtures, which make it possible to reduce Portland cement doses.

Get price

Transmission of Impact Vibration on Concrete and

2015-6-25  The present work exposes an alternative system for detecting vibrations generated by impact on concrete and mortar sheets. In order to carry out the tests it is necessary to implement a system of measurement different than the one proposed by the current UNE EN 140-7. This system consists of an amplifier and a striking device that is also able to measure the deformation of the material once ...

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Accelerated Autogenous Healing of Concrete Pipe

Many concrete water-distribution systems are past their service life and need repair due to leaks associated with cracks. Autogenous healing of concrete cracks and leaks can sometimes occur if the chemistry of distributed water is favorable, whereas small leaks eventually cause pipe failures if water chemistry is unfavorable.

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A Mathematical Model for the Pessimum Size Effect of

2003-3-22  1 A Mathematical Model for the Pessimum Size Effect of ASR in Concrete A. Suwitoa, W. Jinb, Y. Xia, C. Meyerc a Dept. of Civil, Environmental, and Architectural Engineering, University of Colorado, Boulder, Colorado 80309 bParsons Transportation Group/Steinman, New York, NY 10038 c Dept. of Civil Engineering and Engineering Mechanics, Columbia University, New York, NY 10027

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New Trends in Eco-efficient and Recycled Concrete ...

Abstract. Currently, there is an increasing need to incorporate recycled materials, such as rubber, in building materials in order to meet sustainability issues. The use of waste rubber in cement-based materials such as mortar and concrete avoids landfilling and

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Experimental and numerical study on chloride

2020-10-20  The chloride transport model also includes two processes of drying and wetting: in the drying process, some chloride ions will migrate to the surface layer with the evaporation of water, but they will not leave the mortar, so the boundary condition of the bottom surface in the drying process is a flux free boundary; while in the wetting process ...

Get price

American Concrete Institute

The American Concrete Institute (ACI) is a leading authority and resource worldwide for the development and distribution of consensus-based standards, technical resources, educational programs, certification programs, and proven expertise for individuals and organizations involved in concrete design, construction, and materials, who share a commitment to pursuing the best use of concrete.

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Bending the cost curve in brick-and-mortar retail

2020-1-28  Brick-and-mortar retail will continue being challenged to deliver on multiple fronts at once, including customer experience, omnichannel services, and cost excellence. While initially impactful, traditional lean levers employed by store operations limit the scope of opportunity by ignoring 50 percent of cost controlled by other functions ...

Get price
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