Method of immediate estimation of compressive strength

Jan 08, 1980 · Immediate estimation of compressive strength of concrete at the standard curing age of concrete of 28 days being not affected by the weathering of cement used in the concrete is carried out by the addition of an alkali hydroxide as well as a setting accelerator to the mortar portion obtained by wet screening of fresh concrete.

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() THE USE OF NANOPARTICLE ADMIXTURES TO IMPROVE

THE USE OF NANOPARTICLE ADMIXTURES TO IMPROVE THE PERFORMANCE OF CONCRETE. US patent . US6294247, 2001. 13. (compressive strength) of the resulting cement paste with respect to additions

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Compressive Strength Improvement and Admixture Potential

This paper is the result of the investigation of the potential of a local gin, brewed in Nigeria from palm tree liquor juice, for compressive strength improvement and as an admixture in concrete and cement mortar. It was observed from the analysis of the results of the experiment that 5 10% of the local gin also called "ogogoro" increases the compressive strength of concrete and acts

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Innovations in Chemical Admixture Technology as

(15) patents for concrete and masonry admixtures, and has authored over 30 "Innovations in Chemical Admixture Technology as Related to Sustainability" ACI Spring 2012 Convention Dallas ACI Committee 212 on Chemical Admixtures Compressive Strength, MPA 1-day 9.7 19.2 11.9 10.5

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Compressive Strength and Bulk Density of Concrete Hollow

Compressive Strength and Bulk Density of Concrete Hollow Blocks (CHB) with Polypropylene (PP) Pellets as Partial Replacement for Sand Plastics are non-biodegradable and the increasing generation of plastics creates a problem of disposal.

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Method predicts foamed-cement compressive strength

Fig. 1 shows some of the foamed-cement compressive strength curves for 9%, 20%, 29%, and 40% gas by volume which researchers used to develop the new compressive-strength estimation process.

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Method for increasing flexural strength of cement

Mar 25, 1980 · A composition comprising a water-soluble epoxy resin and hydraulic cement has a higher flexural strength than a cement composition which does not contain a water-soluble epoxy resin, but reduction of the compressive strength cannot be avoided in the case of water curing.

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Compressive Strength and Microstructure of Hybrid

Compressive strength results and efflorescence's observations show that the new mixes already analyzed are promising. SEM results show that no traditional porous ITZ was detected in these binders. Keywords—Hybrid alkaline cements, Compressive strength, Efflorescence, SEM, ITZ. I. INTRODUCTION RDINARY Portland cement (OPC) is the dominant

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Influence of Bentonite in Strength and Durability of High

The Compressive strength shows a achieved result for a percentage optimum of B15% & QD50%, it gives a difference from compressive strength to that of a conventional concrete is 11.88%,15.15% and 13.8% in 28,56 and 90 respectively. On further increase in the quantity of bentonite shows a reduction in the compressive strength.

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Non-Destructive Tests on Concrete Methods, Uses

As concrete ages, the rate of increase of pulse velocity slows down much more rapidly than the rate of development of strength, so that beyond a strength of 2,000 to 3,000 psi (13.6 to 20.4 MPa) accuracy in determining strength is less than ±20%.

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Use of Rice Husk Ash in Concrete A Review

IV. Compressive Strength The experimental investigations in previous studies showed that incorporating RHA as partial replacement of cement improves the compressive strength of concrete. The replacement percentages varied from 5% to 30% by weight of cement. However, the optimum replacement level of cement by RHA to give

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UNCONFINED COMPRESSIVE STRENGTH BEHAVIOR OF

UNCONFINED COMPRESSIVE STRENGTH be employed more with cement or lime for maximum strength.The peak UCS values were recorded at 8% RHA for strength improvement of lateritic soil. Olufowobi.J [12] et al, suggested that Soil stabilization is done using powdered glass on clay

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Improvement In The Strength Of Concrete By Using

4. Tests on hardened concrete 4.1 compressive strength test Three specimens for each are cast with different percentages of RHA with gradual Increase of 2.5% from 0%-20% by replacing the cement by weight. Table3 shows that the strength of RHA concrete initially does not match with the strength of control specimen at 7days

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Translucent Concrete Test of Compressive Strength

Translucent Concrete Test of Compressive Strength and Transmittance . A. Karandikar . 1. Student (BE/1430/2011), Department of Civil & Environmental Engineering, Birla

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Ultrasonic Cement Analyzer (UCA) System User Manual

The initial set time is the time required for freshly mixed cement slurry to reach a compressive strength of 50 pounds per square inch (psi). This test helps provide an indication of the compressive-strength behavior of a sample. The WOC time is the time required for the slurry to reach a compressive strength

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EPO T 0548/95 (Cement/USGC) of 1.2.2000

Jan 02, 2000 · A non-expansive, ettringite-producing hydraulic cement which produces a cementitious product which is resistant to carbon dioxide attack, is stable at high temperatures and has a high early strength, said hydraulic cement comprising from 72% to 80% portland cement, from 14% to 21% high alumina cement having a surface area of 3000 to 9000 cm2/g, from 3.5% to 10% calcium sulfate and

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Strength-Enhancing Admixture

Strength-Enhancing Admixture Increase Concrete Strength Master X-Seed 55 is a first-of-its-kind, strength-enhancing admixture that improves both early- and late-age strength development in concrete, while supporting sustainable construction. This unique technology improves cement hydration, providing the ability to reduce cement content of

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The Effectiveness of Fly Ash as a Substitute of Cement For

The purpose of this research is to know the effectiveness of fly ash waste in marine concrete related to the average compressive strength to be used as a substitute for cement.

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Experimental Study on Strength and Durability of

Furthermore, compressive strength of concrete mixtures that keep in water, hydrochloric acid and sodium sulfate were determined at ages up to 56 and 90 days respectively. The experimental results show that at later ages BFS concrete that keeps in water got closer compressive strength to control concrete.

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Characteristics of Concrete Linked to Ballistic

Ultra High Performance Concrete (UHPC) is a mortar or concrete material that has a compressive strength of at least 150 Mpa (21.7 ksi). It normally includes some kind of fiber reinforcement; has a high binder content with

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Polymethylmethacrylate bone cements PubMed Central

Apr 18, 2013 · Stabilisation of the bone cement matrix improves the transfer of load across the cement-prosthesis interface, reducing the likelihood of crack formation in the cement. Various additives such as steel fibres, glass fibres, carbon fibres and titanium fibres have been developed to

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Oritavancin polymethylmethacrylate (PMMA)—compressive

Descriptive summaries for the strength testing were reported as median (minimum, maximum) for compressive strength as a continuous variable. Compressive strength and compressive elastic modulus for PMMA cylinders among the three groups (bland, with oritavancin or vancomycin) were compared using the Kruskal Wallis test.

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The Effect on Concrete by Partial Replacement of

The target value of compressive strength can be achieved at 10% replacement of silica fume. The strength of 15% replacement of cement by silica fume was greater than the normal concrete. Therefore the optimum silica fume replacement percentage varies from 10% to 15%.

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Testing Apparatus for Concrete Compressive Strength of

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US Patent for Superplasticizers for cementitious

Concentration of the superplasticizer mixture in the concrete mixes may vary from about 0.05 to about 3%, preferably from about 0.3 to about 1% (by weight of cement) to obtain hardened concrete having improved compressive strength.

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Non-Destructive Tests on Concrete Methods, Uses

Non-destructive tests of concrete is a method to obtain the compressive strength and other properties of concrete from the existing structures. This test provides immediate results and actual strength and properties of concrete structure. The standard method of evaluating the quality of concrete in

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US Patent # 4,473,405. Admixture for hydraulic cement

A hydraulic cement mix comprising hydraulic cement, aggregate, sufficient water to effect hydraulic setting of the cement, and an admixture comprising a composition or a mixture of compositions selected from the group consisting of alkali, ammonium and alkaline earth salts of thiocyanic acid, and water soluble thiosulfates; a composition or a mixture of compositions selected from the group comprising

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Nanotechnology in the Cement Industry A Patent Analysis

Nanotechnology in the Cement Industry A Patent Analysis Highlights. Written by provides improved hardness and abrasion resistance to concrete. The compressive strength of composition containing nano-calcium carbonate increased by at least 25% and showed 40% improvement in fluid loss, as compared to a cement composition without the nano

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() EVALUATION OF THE COMPRESSIVE STRENGTH OF CONCRETE

The new concrete standards give directives regarding the checking if the hardened concrete conforms to the compressive strength requirements of the designed compressive strength class.

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Prediction of 28-day compressive strength of concrete on

Therefore it can be used as an important parameter for prediction of this system. In other words, the 3-day compressive strength of concrete is a very good criterion to achieve the 28-day compressive strength. It is conceived from figure.3 that the higher the 3-day compressive strength the higher is the 28day compressive strength of the concrete.

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