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Compressive strength and hydration processes of

Feb 01, 2014 Particularly, their influence on both the hydration reaction and the evolution of the compressive strength of concretes made with recycled aggregates is investigated. Therefore, two mixtures are designed with a different nominal water/cement ratio, i.e. 0.45 and 0.60.

Compressive strength and hydration processes of concrete with

Feb 15, 2014 -- Highlights: •The concrete industry is more and more concerned with sustainability issues. •The use of recycled aggregates is a promising solution to enhance sustainability. •Recycled aggregates affect both hydration processes and compressive strength. •A fundamental approach is proposed to unveil the influence of recycled aggregates.

Compressive strength and hydration processes of concrete with

Made available by U.S. Department of Energy Office of Scientific and Technical Information ...

Compressive strength and hydration processes of

Hydration processes are monitored via temperature measurements in hardening concrete samples and the time evolution of the degree of hydration is

Compressive strength and hydration processes of

Feb 01, 2014 The concrete industry is more and more concerned with sustainability issues. • The use of recycled aggregates is a promising solution to enhance sustainability. • Recycled aggregates affect both hydration processes and compressive strength. • A fundamental approach is proposed to unveil the influence of recycled aggregates. •

Compressive Strength and Hydration Process of Self

In concrete containing sea water, sea sand and PCC cement, the hydration process, compressive strength and elastic modulus evolve well with increasing curing age, which reflects the process of...

Modeling of Hydration, Compressive Strength, and

Jan 26, 2017 The degree of cement hydration is calculated by considering concrete mixing proportions, binder properties, and curing conditions. Second, by using the gel–space ratio, the compressive strength of PLC concrete is evaluated. The interactions among water-to-binder ratio, limestone replacement ratio, and strength development are highlighted.

Compressive strength and hydration process of wet

Mar 01, 2019 With increasing dosage of SS and SC, the strength is increased. When the added dosage is 5.0% Na 2 O-E, the compressive strength can reach 41.3 MPa for SS and 48.4 MPa for SC. Furthermore, at the age of 56 d (shown in Fig. 3 (d)), the strength can reach 43.8 MPa with 3.0% Na 2 O-E of SS and 49.7 MPa with 3.0% Na 2 O-E of SC.

Hydration and strength of high performance concrete

Apr 01, 1996 The maximum compressive strength will be about 180 MPa in these conditions. Because such a concrete pos- sesses, in addition to high strength, several other favor- able qualities such as low permeability and self- desiccation, it was designated high performance con-

(PDF) Compressive Strength, Hydration and Pore

Oct 28, 2021 As can be seen, the inclusion of recycled concrete powder has only increased the compressive strength for~37% and 15% for 7 and 28 day cured specimens, respectively. This higher strength...

Compressive strength and hydration processes of concrete

Abstract This paper deals with the correlation between the time evolution of the degree of hydration and the compressive strength of Recycled Aggregate Concrete (RAC) for different water to cement ratios and initial moisture conditions of the Recycled Concrete Aggregates (RCAs). Particularly, the influence of such moisture conditions is investigated by monitoring

Compressive Strength and Hydration Process of Self Compacting Concrete

In order to eliminate the main problems of clean water shortage and fine aggregate in the low land areas and the distant islands, it is purpose to utilized the sea water, marine sand and Portland composite cement to produce the high performance

Concrete Compressive Strength under Changing Environmental

Oct 14, 2020 Cygan et al. proved that increased temperature accelerates the hydration process and cause the workability loss. At the same time, it also produces more ettringite, which adsorbs superplasticisers. ... We took into account the aforementioned 5 MPa surplus of concrete compressive strength and calculated the upper limit of compressive strength ...

3 Curing Techniques to Improve the Compressive Strength of Concrete

May 07, 2021 The hydration process is affected by the initial concrete temperature, the ambient air temperature, the dimensions of the concrete, and mix design. Therefore, for this process to progress well, in-situ concrete must have sufficient moisture and a temperature that favours this chemical reaction at a rapid and continuous rate.

(PDF) Compressive Strength, Hydration and Pore Structure

Oct 28, 2021 However, the mechanical strength of geopolymer with 100% RP from hardened cement paste waste was much better relative to geopolymer with 100% RP from mortar waste or concrete waste, because ...

Compressive Strength, Hydration and Pore Structure of Alkali

Oct 28, 2021 Recycled concrete powder (RCP) recycling can reduce the consumption of natural resources, which has been highlighted as an ecofriendly and sustainable approach. The alkali-activated slag (AAS) offers notable prospects for replacing conventional Portland cement binders. In this study, we partially replaced granulated blast furnace slag (GBFS) with RCP to prepare

Compressive Strength of Concrete Cube Test – The Civil

Aug 24, 2021 Compressive strength of Concrete Formula: The Compressive strength of specimen can be calculated by dividing maximum load carried by the specimen by cross-sectional area of the specimen cubes. The surface area of specimen: = 150 x 150 = 22500mm² = 225cm² Assume, The Max compression load is 450KN.

Modeling of Hydration, Compressive Strength, and Carbonation

Jan 26, 2017 Second, by using the gel-space ratio, the compressive strength of PLC concrete is evaluated. The interactions among water-to-binder ratio, limestone replacement ratio, and strength development are ...

Hydration Processes of Four-Component Binders Containing a

Mar 16, 2022 Over the time of curing, compressive strength of the sample 20PC + 80PK increases, which confirms development of hydration and pozzolanic processes. After 90 days the gain of compressive strength of this mix amounts to about 43% relative to the 28th day compressive strength.

Analytical evaluation of compressive strength for concrete with

The fresh concrete slump and air content were tested based on China Standard GB/T50080-2016 , and the compressive strength and hardened concrete air void parameters were tested based on GB/T50081-2019 and GB/T50082-2009 with the test setups in Fig. 5 respectively. For each group, the average value of the three specimens was reported as the test ...

Modeling of Hydration, Compressive Strength, and Carbonation

Limestone is widely used in the construction industry to produce Portland limestone cement (PLC) concrete. Systematic evaluations of hydration kinetics, compressive strength development, and carbonation resistance are crucial for the rational use of

Compressive strength and hydration characteristics of high

Aug 16, 2018 This paper investigated the feasibility of replacing cement with fly ash (FA) mass ratios ranging from 40 to 70% to produce high-volume FA (HVFA) concrete. A suite of mechanical tests were conducted over a 180-day time frame. The hydration properties were systematically evaluated using isothermal calorimetry test, X-ray diffraction analysis,

Technologies Free Full-Text Laboratory Study on the Water

The compressive strength of the concrete is decided by hydration and is subsequently determined by the water holding capacity of the specific concrete. In comparison, the curing process is an ideal environment. ... The hydration process of concrete results in the development of empty pores and a decrease in the relative humidity of the concrete ...

Study on Influence Factors of Compressive Strength of Low

The cementation ability of cement can be fully expressed when a water to cement ratio of 0.45~0.5 is employed, making foamed concrete have a compressive strength higher than 2 MPa. The foam content is inversely proportional to the compressive strength and dry density of foamed concrete, and the volume ratio of slurry to foam should be 2:1~3:1.

Compressive Strength and Hydration Process of

In order to eliminate the main problems of clean water shortage and fine aggregate in the low land areas and the distant islands, it is purpose to utilized the sea water, marine sand and Portland composite cement to produce the

Compressive Strength of Concrete Cube at 28 Days Hydration

The effect of calcium nitrate (CN) dosages from 0 to 3% (of cement mass) on the properties of fresh cement paste rheology and hardening processes and on the strength of hardened concrete with two ...

Compressive strength and hydration characteristics of high

Aug 16, 2018 This paper investigated the feasibility of replacing cement with fly ash (FA) mass ratios ranging from 40 to 70% to produce high-volume FA (HVFA) concrete. A suite of mechanical tests were conducted over a 180-day time frame. The hydration properties were systematically evaluated using isothermal calorimetry test, X-ray diffraction analysis,

Modeling of Hydration, Compressive Strength, and Carbonation

Limestone is widely used in the construction industry to produce Portland limestone cement (PLC) concrete. Systematic evaluations of hydration kinetics, compressive strength development, and carbonation resistance are crucial for the rational use of

Compressive Strength Of Concrete - KPSTRUCTURES

May 27, 2021 The compressive strength of Concrete defined as the resistance to failure under the action of compressive forces. Especially for concrete, compressive strength is an important parameter to determine the

Compressive Strength of Concrete Cube Test – The Civil

Aug 24, 2021 Compressive strength of Concrete Formula: The Compressive strength of specimen can be calculated by dividing maximum load carried by the specimen by cross-sectional area of the specimen cubes. The surface area of specimen: = 150 x 150 = 22500mm² = 225cm² Assume, The Max compression load is 450KN.

Concrete Temperature Monitoring for Curing and

Apr 19, 2021 Curing for Compressive Concrete Strength; Newly mixed concrete commonly holds more water than is needed for the hydration of the cement. But too much evaporation can slow down or inhibit proper hydration.

Modeling of Hydration, Compressive Strength, and

Limestone is widely used in the construction industry to produce Portland limestone cement (PLC) concrete. Systematic evaluations of hydration kinetics, compressive strength development, and carbonation resistance are crucial

Study on the Strength and Hydration Behavior of Sulfate

Apr 11, 2022 The hydration process and compressive strength and flexural strength development of sulphate-resistant Portland cement (SRPC) curing at 20 °C, 40 °C, 50 °C, and 60 °C were studied. ... 50/60/80 °C; relative humidity, 50%), the 3-day strength of concrete had obviously increased, but the 60-day strength had greatly decreased. Han et al. ...

Analytical evaluation of compressive strength for concrete with

The fresh concrete slump and air content were tested based on China Standard GB/T50080-2016 , and the compressive strength and hardened concrete air void parameters were tested based on GB/T50081-2019 and GB/T50082-2009 with the test setups in Fig. 5 respectively. For each group, the average value of the three specimens was reported as the test ...

Experimental Research on Dehydration Process and Strength of Concrete ...

May 18, 2022 After drying, the concrete strength change is the result of the competition between the microcracks caused by water evaporation and the increased solid-phase density caused by further hydration during drying process [14–16]. The drying temperature that has the minimal influence of the C30 concrete specimen with a side length of 100 mm is 105°C.

Compressive Strength and Durability of Foamed Concrete

Jul 06, 2022 the compressive strength, porosity and rapid chloride permeability of foamed concrete containing 30% PSBE. Foamed concrete (FC) is the mixing of cement paste and pref or med foams and provides

Strength of Concrete: Nature, Kinds and Factors Concrete Technology

In general bond strength is approximately proportional to the compressive strength of concrete upto about 200 kg/cm 2. For higher strengths of concrete, the increase in bond strength becomes progressively smaller. ... On the other hand higher temperature during placing and setting will accelerate the process of hydration, but the quality of the ...

Technologies Free Full-Text Laboratory Study on the Water

The compressive strength of the concrete is decided by hydration and is subsequently determined by the water holding capacity of the specific concrete. In comparison, the curing process is an ideal environment. ... The hydration process of concrete results in the development of empty pores and a decrease in the relative humidity of the concrete ...

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