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mineral composition and microstructure of portland cement

Materials | Free Full-Text | Hybrid Interfacial Transition Zone between ...

TodayThe annual production of concrete exceeds 30 billion tons worldwide [].The majority of currently produced concrete is based on Portland cement, which manufacture is responsible for 5-8% of the total global CO 2 emission [2,3].Research in the field of civil engineering related to the reduction of CO 2 emission and to the sustainability of structures has advanced significantly in recent years.

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Effect of Curing Temperature on Cement Hydration

a fly ash-OPC blended cement, CEM II/A-V 42.5R (EN-197-1) and an ordinary Portland cement, CEM I 42.5R, at temperatures ranging between 4 and 85°C. EXPERIMENTAL Setting times (min)The chemical composition of the two Spanish cements (CEM I 42.5R and CEM II/A-V 42.5R) used in this study is given in Table 1. Some physical and

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(PDF) Microstructure and durability of Portland cement-carbon nanotube ...

When incorporated into cementitious matrices, the addition of as little as 0.05% CNTs (by weight of Portland cement) can impart impressive mechanical properties improvements, with reported average...

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Cement Types, Composition, Uses and Advantages of Nanocement ... - Hindawi

In the chemical analysis of cement, its elemental composition is analyzed (e.g., Ca, Si, Al, Mg, Fe, Na, K, and S). Then, the composition is calculated in terms of their oxides and is generally expressed as wt.% of oxides.

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Study of the pore solution and the microstructure of mineral additions ...

substitution of cement by mineral addition modifies the total porosity and the pore sizes distribution of the blended cement pastes tested. Chemical analyses showed that all the tested pore solutions are mainly composed by sodium and potassium. A significant concentration of divalent ions, such as sulfates and calcium, is also noticed.

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Modification of Composition and Microstructure of Portland Cement ...

This study aims to analyze the effects of supercritical carbonation (CO2 at 20 MPa and 318 K) on the physicochemical properties of ordinary Portland cement pastes. The evolution of the main crystalline phases of the cement pastes during carbonation was determined by means of X-ray diffraction and thermogravimetric analysis. The pore structure was analyzed by low-temperature N2 adsorption− ...

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Influence of "Nicoflok" Polymer-Mineral with Portland Cement on ...

The efficiency of this polymer with Portland cement depends on several factors, such as the amount of cement, curing time, size and shape of soil grains. The optimum dosage of Nicoflok was 0.9% mixed with 1% cement. Stabilizing the base and recycled asphalt materials with cement and Nicoflok also improves the long-term performance of the pavement.

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Modelling - Cement Science

The model can simulate the development of properties of Portland cement, e.g. the development of hydration and microstructure, the volume changes of the hardening cement pastes, and the effect of geometrical changes of the microstructure on the creep of the hardening concrete. The emphasis of the model is on the formation of the microstructure ...

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Quantitative Imaging of Clinker and Cement Microstructure - NIST

and identi•ed tricalcium silicate as the principal constituent of portland cement clinker. Sub-sequent work by A.E. Tornebohm, Bates and Klein [2] (see Fig. 1), and others provided a more detailed description of the phases and textures of clinker and also developed the techniques for light microscopy as it applies to portland cement clinker [11].

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A Model of Phase Stability, Microstructure and Properties During ... - NIST

systems [13, 14, 17] or portland cement systems [3, 4, 6, 7, 8, 9, 12, 15, 16, 23, 24]. In general, these investigations have observed three main stages of leaching in well-hydrated systems [9, 13, 17]: An initial stage, in which dilution of calcium, alkali, and hydroxyl ions in the leachate causes dissolution of portlandite (CH). During this

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Modification of Composition and Microstructure of Portland Cement ...

This study aims to analyze the effects of supercritical carbonation (CO2 at 20 MPa and 318 K) on the physicochemical properties of ordinary Portland cement pastes. The evolution of the main...

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Chemical Composition of Portland Cement - Builders Booklet

May 21, 2021The most common compounds responsible for strength are tricalcium silicate and dicalcium silicate. They together account for between 70% and 80% of cement. The average C 3 S content of modern cement is around 45%, while C 2 S content is around 25%. The total amount of C 3 A and C 4 AF in current cements has decreased significantly.

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Cement Reaction and Resultant Physical Properties of Cement Paste - J-STAGE

heat Portland cement (symbol M), and low heat Portland cement (symbol L). The test results of chemical analysis according to JIS R 5202 and JIS R 5204 are given in Table 1, and the mineral composition obtained through X-ray powder diffraction (XRD) and Rietveld analysis are given in Table 2. The specimens were fabricated using cement paste with ...

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The Microchemistry and Microstructure of Portland Cement - DeepDyve

Portland cement belongs to a family of materials that usually appear as a grey powder composed of several minerals. Upon contact with water a complex series of interconnected reactions takes place whose products are in intimate contact and consequently form a hardened mass. The most effective basis for understanding and controlling the properties of materials is a knowledge of their structure ...

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Portland cement - Wikipedia

Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout.It was developed from other types of hydraulic lime in England in the early 19th century by Joseph Aspdin, and is usually made from limestone.It is a fine powder, produced by heating limestone and clay minerals in a kiln to form clinker ...

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Concrete: Microstructure, Properties, and Materials

P. Kumar Mehta, Ph.D., is Professor Emeritus, Civil and Environmental Engineering, at the University of California at Berkeley. The recipient of the Berkeley Citation-the highest honor for contributions to his field and to the University--Dr. Mehta is an Honorary Member of the American Concrete Institute (ACI) and is a member of its Committee on Sustainable Development.

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Behavior and Microstructure Property Evolution of Hardened Cement ...

Chemical composition of the P.O42.5 Portland (unit: wt.%). SiO 2CaO Al 2O 3Fe 2O 3MgO SO 3Na 2O K 2O f-CaO TiO 2Loss 22.31 60.98 5.87 3.38 2.32 2.49 0.39 0.75 0.2 0.58 2.51 2.1.3. Mixing Water The mixing water used for preparing the tailings consolidated body specimens was urban tap water. 2.2.

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Portland Cement: An Overview as a Root Repair Material - Hindawi

Jan 6, 2022Portland Cement: An Overview as a Root Repair Material: Portland cement (PC) is used in challenging endodontic situations in which preserving the health and functionality of pulp tissue is of considerable importance. PC forms the main component of mineral trioxide aggregate (MTA) and demonstrates similar desirable properties as an orthograde or retrograde filling material.

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Correlation Between Microstructure, Phase Composition and Mechanical ...

combined with ordinary and refractory cement is new option for reapplication of this waste material. In this study, investigated bonding agents were based on two types of fly ashes from coal combustion process and cements - ordinary Portland cement and high-aluminate cement. Change of mineral phase composition of the composites with

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Effects of Different Mineral Admixtures on the Properties of ... - Hindawi

Mineral admixtures include fly ash ( FA ), silica fume ( SF ), ground granulated blast furnace slag ( GGBS ), metakaolin ( MK ), and rice husk ash ( RHA) which possess certain characteristics through which they influence the properties of concrete differently.

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US5804175A - Method for producing cement - Google Patents

A method for producing cement useful for preparing pastes, mortars, concretes and other cement-based materials, having a high workability with reduced water content, high strength and density, and a rapid development of strength, which method includes a mechanicochemical treatment of cement. The method includes a two-stage mechanicochemical treatment of a mixture of cement and at least one of ...

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Influence of addition of calcium oxide on physicochemical properties of ...

This material has biocompatibility, antibacterial activity, sealing ability, and bioactivity. [ 2, 3] The chemical similarity between MTA and Portland cement (PC) is known, since MTA is composed of PC as its main component. [ 4] Bismuth oxide is added to MTA to promote radiopacity. [ 5]

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nanosilica in cement pastes

It has a high content of amorphous silica in its composition, which, by the 40 pozzolanic reaction, interacts with the calcium hydroxide coming from the hydration 41 reaction of the cement, generating secondary C-S-H gels. In addition, it reduces the 42 overall Ca/Si ratio, increases the mean chain length and alters the C-S-H morphology

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Cementitious Materials : Composition, Properties, Application

This editorial work consists of four parts including cement composition and hydration, Special cement and binder mineral phases, Cementitious and binder materials, and Measurement and properties. Every part contains different contributions and covers a broad range within the area. Contents Part I: Cement composition and hydration

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Frontiers | Hydration kinetics of oil well cement in the temperature ...

where Q (t) is the cumulative heat evolution at curing time t (J/(g cement)); Q 0 is the theoretical cumulative heat for a fully reacted cement (J/(g cement)), which can be calculated based on the mineral composition of the cement clinker phase (Taylor, 1997).. Cement hydration kinetics describe the evolution of α with time. The influencing factors of cement hydration kinetics can be divided ...

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Effects of graphene oxygen content on durability and microstructure of ...

Ordinary Portland cement (PO 42.5) used in this study was purchased from Bohai Cement Co. ltd. (Jinzhou, China). Its chemical composition and physical properties are shown in Table 1, Table 2.The sieved river sand is used to prepare cement mortar, and the particle gradation is shown in Table 3.Graphite powder was purchased from Qingdao Huatai Lubrication and Sealing Technology Co. ltd. (C ...

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Characterization of Portland cement concrete microstructure using the ...

Portland cement concrete is a composite material made up of the hydrated cement matrix, fine (75 μm to 4.75 mm) aggregate, and coarse (>4.75 mm) aggregate. A major factor determining the strength of the material is the bond at the interface of the matrix and the aggregates [1].

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Materials | Free Full-Text | Hybrid Interfacial Transition Zone between ...

The annual production of concrete exceeds 30 billion tons worldwide [].The majority of currently produced concrete is based on Portland cement, which manufacture is responsible for 5-8% of the total global CO 2 emission [2,3].Research in the field of civil engineering related to the reduction of CO 2 emission and to the sustainability of structures has advanced significantly in recent years.

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Mineral Admixtures | Fly Ash - Silica Fume - Rice Husk - GGBS

In the production of cast iron (also called pig iron) if the liquid slag is rapidly quenched from a high temperature by either water or a combination of air and water, most of the lime, magnesia, silica, and alumina are held in a noncrystalline or glassy state. The water-quenched product is called granulated slag due to sand-size particles.

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Microstructure Evolution in Ordinary Portland Cement ... - SpringerLink

The microstructure plays a vital role in governing the physical, chemical and strength properties of cement. Hence, microstructure analysis has been carried out by replacing 0% to 14% of the mass of ordinary Portland cement with metakaolin and red mud of different ratios. Studies have also been carried out to understand the effect of blending on the pH of cement paste and its influence on the ...

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Biological and chemical properties of five mineral oxides and of ...

Five Mineral Oxides CSC (5MO) is derived from Portland cement, developed to treat different types of dental accidents and endodontic complications, and is considered effective as a pulp capping ...

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Polymorphism of tricalcium silicate in Portland cement: A fast visual ...

The chemical composition (wt. %) ... "Structure of Portland Cement Minerals," Proceedings of the 5th ISCC, Tokyo, Vol. 1, pp. 1-41. ... "Effect of Fluorite-Gypsum Composite Mineralizer on the Microstructure and Properties of Portland Cement Clinker Phase," Proceedings of the 9th ICCC, New Delhi, Chap. 2, pp. 342-350. ...

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SEM Investigation of Microstructures in Hydration Products of Portland ...

Hydrating in time cement paste is composed mainly of hydrated silicates of calcium so called C-S-H-phase accompanied with a calcium hydroxide (portlandite) and hydration products of calcium aluminate i.e. ettringite.

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Prediction of compressive strength up to 28 days from microstructure of ...

The influence of the characteristics or the microstructure of Portland cement on compressive strength up to 28days has been statistically investigated by application of partial least square (PLS ...

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Composition-Property Relationships in Low-Energy, Low-CO 2 Calcium ...

Composition-Property Relationships in Low-Energy, Low-CO 2 Calcium Sulfoaluminate-Belite Cement Irvin A. Chen & Maria C.G. Juenger The University of Texas at Austin Introduction Phase Composition & Microstructure Phase Synthetic Clinkers Phase Composition (weight %) #1 #2 #3 TG † R TG R TG R C2S 20 22.36 40 44.94 60 70.82 C4A3$ 60 65.34 40 41 ...

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Microstructure of Concrete - IntechOpen

Cement mainly consists of silica (SiO 2) or (S), alumina (Al 2 O 3) or (A), lime (CaO) or (C), and iron oxide (Fe 2 O 3) or (F). The main compounds of ordinary Portland cement are tri-calcium silicate (C 3 S), di-calcium silicate (C 2 S), tri-calcium aluminate (C 3 A), and tetra-calcium aluminoferrite (C 4 AF).

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Microstructure and composition of hydration products of ordinary ...

Microstructure and composition of hydration products of ordinary Portland cement with ground steel-making slag Li Yong-xin, Chen Yi-min, Zhang Hong-tao, He Xing-yang, Wei Jiang-xiong & Zhang Wen-sheng Journal of Wuhan University of Technology-Mater. Sci. Ed. 18, 76-79 ( 2003) Cite this article 122 Accesses 3 Citations Metrics Abstract

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Performance Research on Slag-Steel Slag Based Composite Portland Cement

The mineral composition, ratio values and strength were shown in Table 3. Tab 2 Chemical composition of Portland cement / % SiO 2 Al 2O 3 Fe 2O 3 CaO MgO TiO 2 R 2O MnO SO 3 20.49 7.53 4.72 62.13 1.98 0.09 0.75 0.05 0.88 Tab 3 Mineral composition, ratio values and strength of Portland cement Mineral composition /% Ratio value/% Flexural

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The Microstructure of Portland Cement-Based Materials: Computer ...

Cement paste is a material formed from the hydration reaction of portland cement, usually a calcium silicate material, with water. The microstructure of cement paste changes drastically over a time...

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Microstructure of Portland cement mortar amended by ... - SpringerLink

The chemical composition of PC and BKS samples is presented in Table 1. Al 2 O 3 content in BKS of type II is increased in comparison with that of BKS of type I at the same fraction of 0.06 mm. On the other hand, Al 2 O 3 content is decreased on half in type II of BKS with the coarser fraction of sand (0.1 mm).

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