us4076546a method for production of expansive cement
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US4076546A - Method for production of expansive

A method for the production of an expanding cement which includes the stepsn which so-called "Portland cement" is dry-mixed with an expanding additive which comprises 6 to 30% of the total weight of the cement. The expanding additive contains 2 to 8% dialuminium pentahydroxychloride, 4% to 15% gypsum, and optionally, a small amount up to about 7% lime.

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(PDF) Expansive cements for the manufacture of the ...

For the production of expansive compositions, the portland cement CEM I 42,5 R and ground quicklime SR EN 459 CL 90-Q h ave been used [7]. The lime has b een mod ified b y its grind

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Production of expansive additive to portland cement ...

Jan 01, 2007  In order to produce the shrinkage-less and expansive cement the portland cement CEM I 42.5 from Górażdże cement plant in Poland was used. The phase composition of this cement was as follows: C 3 S, 66.50%; C 2 S, 9.76%; C 3 A, 9.17% and C 4 AF, 7.88%. Initial setting time was 3 h 15 min and final setting time was 4 h 30 min, respectively; the specific surface—3.375 cm 2 /g (Blaine

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US4066469A - Rapid hardening cement - Google Patents

Associated Portland Cement Manufacturers Ltd Original Assignee Associated Portland Cement Manufacturers Ltd Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.) 1975-06-04 Filing date 1976-10-15 Publication date

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Expansive Cement - an overview ScienceDirect Topics

In Building Materials in Civil Engineering, 2011. 4.3.2 Expansive cement. Expansive cement can generate volume expansion in the hydration process, and it does not shrink but also expand to some extent. The use of expansive cement can overcome and improve some shortcomings of ordinary cement concrete (commonly used cement will shrink in the hardening process, which causes the

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Method for production of expansive cement - Centralna ...

Method for production of expansive cement . United States Patent 4076546 . Abstract: A method for the production of an expanding cement which includes the steps n which so-called "Portland cement" is dry-mixed with an expanding additive which comprises 6 to 30% of the total weight of the cement. The expanding additive contains 2 to 8% ...

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expansive cement production occurrence

US4076546A - Method for production of expansive . A method for the production of an expanding cement which includes the stepsn which so-called "Portland cement" is dry-mixed with an expanding additive which comprises 6 to 30% of the total weight of the cement.

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Placement Method for Expansive-Cement Concrete Concrete ...

Jul 01, 1998  Placement Method for Expansive-Cement Concrete We're placing our first bridge deck with shrinkage-compensating concrete using Type K expansive cement. We normally use a crane and bucket for bridge decks but wonder if this is the best placement

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US4066469A - Rapid hardening cement - Google Patents

A gypsum-free ultra-rapid hardening Portland Cement ground to a specific surface area of 3000 to 7000 cm 2 /g and containing a minor proportion of an acid salt of an alkali metal, ammonium or organic base.

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Production of expansive additive to portland cement ...

Jan 01, 2007  In order to produce the shrinkage-less and expansive cement the portland cement CEM I 42.5 from Górażdże cement plant in Poland was used. The phase composition of this cement was as follows: C 3 S, 66.50%; C 2 S, 9.76%; C 3 A, 9.17% and C 4 AF, 7.88%. Initial setting time was 3 h 15 min and final setting time was 4 h 30 min, respectively; the specific surface—3.375 cm 2 /g (Blaine

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Method of Estimating Expansive Strains Produced in ...

A method of estimating distribution of expansive strains produced in members of rectangular cross section with reinforcing bars arranged in any manner based on

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Standard Test Method for Restrained Expansion of Expansive ...

1.1 This test method covers the determination of length changes of expansive cement mortar, while under restraint, due to the development of internal forces resulting from hydration of the cement. 1.2 The values stated in non-SI units are to be regarded as the standard. 1.3 This standard does not purport to address all of the

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Analysis of expansive reactions in cement concrete ...

DOI link for Analysis of expansive reactions in cement concrete pavement structures by microscopical methods By J. Stryk, A. Frybort, J. Stulirova, K. Pospisil, M. Gregerova Book Bearing Capacity of Roads, Railways and Airfields

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What Is EXPANSIVE CEMENT? Find Complete List Of Expansive ...

Type S Expansive Cement. Type S expansive cement has the following composition: Portland cement (very high C 3 A is present, about 20 %) Calcium sulphate (in large proportion) Stoichiometry Reaction-C 3 A + 3CS + 32 H → C 6 AS 3 H 32­ Type O Expansive Cemenet. The expansion occurs from the hard-burnt CaO in Type O expansive cement.

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US Patent for Method of producing expansive and high ...

This invention relates to a method of producing expansive and high strength cementitious pastes, mortars and concretes. As known in the art, cement conglomerates (concretes, mortars or grouts) notably undergo contraction during hydration of the cement due to the evaporation of the water and/or the sedimentation of the inerts.

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Production of a Binder Material with an Expansive Nature ...

Request PDF Production of a Binder Material with an Expansive Nature Used for Cracks Repairing in Buildings from a Locally Available Materials cement of two types were mixed with gypsum to ...

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Concrete: Manufacturing Process

The compaction of concrete can be achieved by the following methods. 1. Hand Compaction . 2. Compaction by Vibration . a. Needle Vibrator: b. Formwork Vibrator . 3. Compaction by Spinning . 4. Compaction by Jolting . 5. Compaction by Rolling . Curing . Cement gains strength and hardness because of the chemical action between cement and water.

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EXPANSIVE ADMIXTURE AND METHOD FOR PRODUCING SAME ...

The expansive material is blended with cement into a cement composition. The preparation conditions are preferably a carbon dioxide gas flow rate of 0.01 to 0.1 L/min. and a temperature of 200 to 800°C, under which conditions there is calcium carbonate formed.

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A new method to create one-part non-Portland cement powder ...

Apr 24, 2018  Non-Portland cement or alkali-activated slag is regarded as non-friendly for users, due to the corrosive nature of alkaline solution. This negatively affects the mass production and commercial viability of this cement. In this work, user- and eco-friendly one-part non-Portland cement (NPC) was prepared by blending ground-granulated blast-furnace slag (GGBFS) with stable dry activator (SDA ...

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Expansive cement and the method of producing such cement ...

US-3510326-A chemical patent summary.

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US Patent for Method of producing expansive and high ...

This invention relates to a method of producing expansive and high strength cementitious pastes, mortars and concretes. As known in the art, cement conglomerates (concretes, mortars or grouts) notably undergo contraction during hydration of the cement due to the evaporation of the water and/or the sedimentation of the inerts.

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Expansive Cement Concrete Concrete Construction Magazine

Two basic formulations for expansive cement have been developed in the United States. One is designed to expand and compensate for the shrinkage which occurs in conventional portland cement concrete as it hardens. The product of this formulation is called "shrinkage compensated cement." The other is designed to create greater expansion in the ...

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Method of Estimating Expansive Strains Produced in ...

A method of estimating distribution of expansive strains produced in members of rectangular cross section with reinforcing bars arranged in any manner based on

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Standard Test Method for Restrained Expansion of Expansive ...

1.1 This test method covers the determination of length changes of expansive cement mortar, while under restraint, due to the development of internal forces resulting from hydration of the cement. 1.2 The values stated in non-SI units are to be regarded as the standard. 1.3 This standard does not purport to address all of the

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Analysis of expansive reactions in cement concrete ...

DOI link for Analysis of expansive reactions in cement concrete pavement structures by microscopical methods By J. Stryk, A. Frybort, J. Stulirova, K. Pospisil, M. Gregerova Book Bearing Capacity of Roads, Railways and Airfields

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Expansive Cement and Shrinkage-Compensating Cement ...

An expansive cement is one that, after setting, increases in volume as it cures. This property can be used either to induce a limited amount of tensile stress in the reinforcement or to compensate for subsequent drying shrinkage. When an expansive cement is designed primarily for use in compensating for drying shrinkage it is called a shrinkage ...

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Cement Types - Portland Cement Association

Chemical testing includes oxide analyses (SiO 2, CaO, Al 2 O 3, Fe 2 O 3, etc.) to allow the cement phase composition to be calculated. Type II cements are limited in C150/M 85 to a maximum of 8 percent by mass of tricalcium aluminate (a cement phase, often abbreviated C 3 A), which impacts a cement’s sulfate resistance. Certain oxides are ...

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JC/T 313-2009 English Version, JC/T 313-2009 Test method ...

JC/T 313-2009 English Version - JC/T 313-2009 Test method for determining expansive ratio of expansive cement (English Version): JC/T 313-2009, JC 313-2009, JCT 313-2009, JC/T313-2009, JC/T 313, JC/T313, JC313-2009, JC 313, JC313, JCT313-2009, JCT 313, JCT313

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Production of a Binder Material with an Expansive Nature ...

Request PDF Production of a Binder Material with an Expansive Nature Used for Cracks Repairing in Buildings from a Locally Available Materials cement of two types were mixed with gypsum to ...

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A study on the hydration products of a non-expansive ...

Dec 01, 1995  In the context of a project aiming at the preparation of an energy-saving cement within the CaO-SiO 2-AlO 3-SO 3 system having non-expansive properties, clinker was prepared by sintering a mix of industrial raw materials at 1280 °C in a laboratory oven.. The hydration products of the cement cured to 90 days were studied by Scanning Electron Microscopy, X-Ray Diffraction and

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Expansive cement - GENERAL PORTLAND, INC.

6. The expansive cement of claim 4 wherein said expansive cement contains from about 10 to about 30 wt % of said free CaO. 7. The expansive cement of claim 6 wherein said expansive cement composition has a particle size which passes 80 mesh (Tyler) and

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Methods for Restraining Expansive Concrete - MyScienceWork

Methods for Restraining Expansive Concrete. 7988782 - 11673391 - USPTO Application Feb 09, 2007 - Publication Aug 02, 2011 Edward K. Rice Eric Bescher David Flax Daniel Goods Kyle de Bruyn. Abstract.

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SOIL MOISTURE EXPANSIVE METHODS FOR VARIOUS CEMENT

Within the condition of Andhra Pradesh also, black cotton soils are utilized in road construction. There's lack of strength connected with the introduction of swelling of black cotton soil in wet conditions during wet seasons during summer time seasons, with the introduction of shrinkage of black cotton soil. Consequently, handling from the soil becomes difficult during construction.

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