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Experimental Study on Fly Ash based Geo-Polymer Concrete

concrete and geo polymer concrete. Compressive strength, acid resistance and water absorption tests were carried out after consequent 7, 14, 28 days respectively. ... while in compaction factor test, concrete cannot flow freely. So, flow table test is recommended for workability ... ash based geo polymer concrete of ordinary and standard grade ...

Studies on performance of plagioclase based alkali ...

Jun 22, 2021· Keeping in view of the hazardous effects of production of Ordinary Portland Cement (OPC) on the environment, it is necessary to minimize the usage of …

Bacterial Concrete - 123seminarsonly.com

concrete and standard grade concrete are designed using IS: 10262-1982. Materials ... environment such as acid attack, the durability factors are proposed by the author, with the philosophy of ASTM C 666–1997, as the basis. In the present investigation, the author derived the "Acid Durability Factors…

International Journal of Recent Technology and Engineering ...

Abstract- Permeability is the most crucial internal factor in concrete durability. The durability of a concrete is closely related to its permeability. The permeability dictates the rate at which aggressive agents can penetrate to attack the concrete and the steel reinforcement. Water penetrability is defined as the degree to which

Bonding behavior of concrete matrix and alkali-activated ...

Standard grade Portland cement (P⋅I 42.5) was used for all concrete mixtures, and its physical and mechanical properties were listed in Table 1.The fine aggregates used in the concrete matrix were natural sand with continuous grading (particle size of 0.15–4.75 mm) and fineness modulus of 2.94, and the coarse aggregates were broken stone with continuous grading (5–20 mm).

FEASIBILITY OF MAKING CONCRETE USING LIGNITE COAL …

concrete cubes with and without bottom ash was r ecorded, and the improvement of resistance of acid attack of bottom ash concrete cubes was studied as shown in Table 4. No specific British standard or ASTM test method relating to the evaluation of the resistance of concrete to sulphate attack …

SID.ir | PERFORMANCE OF STANDARD GRADE BACTERIAL CONCRETE

Aug 25, 2021· From the durability studies, the percentage weight loss and percentage strength loss with 5%H2SO4 revealed that Bacterial concrete has less weight and strength losses than the conventional concrete and it also revealed that bacterial concrete is more durable in terms of "Acid Durability Factor" and "Acid Attack Factor" than conventional concrete.

CBD-60. Characteristics of Window Glass - NRC-IRC

Other than hydrofluoric acid, alkaline solutions are the most aggressive in their attack on glass. If an alkaline solution remains on the surface, the attack can become severe; consequently, frequent cleaning is quite important. The effect of the attack is to reduce the brilliance of the surface, but severe conditions can obscure visibility.

(PDF) Potential | teja tolu - Academia.edu

Durability studies carried out in the investigation through acid attack test with 5% sulphuric acid revealed that bacterial concrete is more durable in terms of "Acid Durability Factor" than conventional concrete and bacterial concrete is less attacked in terms of "Acid Attack Factor" than conventional concrete …

Acid Resistance - Portland Cement Association

German researchers tried to improve the resistance of concrete pipes exposed to long-term acid attacks in a pH range between 4.5 and 6.5. The fundamental solution of increasing chemical resistance by lowering concrete's permeability was used to optimize concrete mix designs.

Strength and Durability Characteristics of GGBFS Based HPC

Durability characteristics of concrete have shown good performance for different percentage of replacement of GGBFS and ROBO sand. Replacement of both GGBFS and ROBO sand for 40% gave a satisfactory result • Resistance to acid and sulphate attack of admixed concrete has given 10% more strength than the control concrete.

Chloride Penetration - an overview | ScienceDirect Topics

The durability properties of concrete made with RA, namely permeation properties, resistance to carbonation and chloride penetration, chemical attacks, resistance to freeze–thaw attack and abrasion, as well as the alkali–silica reaction of concrete made with RA, have also been discussed. Again, as the presence of RAs, including in the form ...

Wood Standards - ASTM International

Wood Standards. ASTM's wood standards are instrumental in the evaluation and testing of the physical and chemical properties of a wide range of wood and wood-based products. Wooden materials covered here include timber, lumber, wood-base fibers, commercial softwoods and hardwoods, wood preservatives, laminated timber, and composite lumber to ...

DURABILITY OF CONCRETE IN ACIDIC SOILS AND WATERS

Factors controlling the rate of attack on concrete by such acidity are also discussed. It is the rate of penetration of the acid which will govern the durability of the concrete and the chief factors to consider are: a) chemical factors such as type of acid and its ph, the cementitious binder and the type of aggregate; B) physical factors ...

Durability of Materials - SlideShare

Nov 23, 2009· Durability: gas attack – oxygen, halogens, sulphur dioxide Science note Attack by gasses Rates of attack by gasses are measured in the way give a lot of surface) is held at temperature for an sketched in Figure 1: a thin sheet of the material (to increasing time, …

Sulfuric acid | H2SO4 - PubChem

In an experiment studying the clearance via the blood of radiolabeled sulfuric acid aerosol in different species, the authors have observed that sulfur from sulfuric acid was rapidly cleared (from 2 to 9 minutes) from the lungs of animals into the blood following inhalation exposure. Sulfate is a normal constituent of the blood and is a normal metabolite of sulfur-containing amino acids, and ...

Experimental Investigation on Self Compacting Concrete by ...

May 20, 2020· 3. ACID RESISTANCE Hydrochloric acid (HCL) TABLE 11 Acid Resistance test results. DURABILITY TEST ON CONCRETE. The ability of this SCC along with the various admixtures are tested for its ability to resist weathering action, chemical attack and abrasion. The test on durability varies based on its environmental conditions.

Laboratory investigation and modeling of concrete ...

Oct 01, 2019· Durability of concrete specimens from the sulfate attack was assessed by placing the cube specimens into MgSO 4 solution for 28 days. 15 concrete specimens of dimensions 150 × 150 × 150 mm were made so that 3 cubes of different mix can be tested after curing in water for 28 days.

Different Types of Concrete Grades and their uses | Base ...

Different types of concrete grades and their uses. Whether you are looking for the right domestic or commercial concrete mix for your construction job, or are just curious about the different grades of concrete and would like to know more, read on to get an understanding of these different types of concrete and their uses, or get in contact today by calling us on 01442 389105

Products and Equipment from Sauereisen Inc ...

The standard grade is combined with brick or tile to protect concrete and steel substrates from attack by corrosive chemicals and physical abuse. The cold-curing version, 25 LT, is specified for similar applications and accommodates installation temperatures as low as 35°F.

2 - PCI

Standard Grade: Normal plant-run finish produced in forms that impart a smooth finish to concrete. Surface holes smaller than 1/2 inch (13mm) caused by air bubbles, normal color variations, form joint marks, and minor chips and spalls are acceptable.

(PDF) Effect of Acidic Curing Environment on the Strength ...

The factors that affect the rate o f concrete decomposition when subj ected to acidic attacks include po rosity of the cement paste, acidic concentration, solubility of the acid, fluid transport ...

A Review of Emerging Way to Enhance the Durability and ...

Recently, a novel concrete technology has been introduced, that is by incorporating biological approach in concrete. This unique way of concrete design crossbreed between biology and engineering study of concrete is called microbial concrete, which involves the utilisation of bacteria to increase the strength and durability of concrete.

DURABILITY OF CONCRETE IN ACIDIC SOILS AND WATERS

DURABILITY OF CONCRETE IN ACIDIC SOILS AND WATERS. The many different factors affecting the rate of attack by and on concrete are reviewed in detail with reference to British and foreign standards and conditions, with consequential recommendations as to good practice. Measures of acidity and types of acidic waters including mineral acids, humic ...

Study of Effect of Chemicals (Acid) Attack on Strength and ...

acid attack on performance of concrete, strength of concrete and durability of concrete. K. Kawai et al [1], In this paper, Author has proposed a prediction method for the deterioration of concrete due to sulfuric acid. Concrete cylinder specimens were immersed in various concentrations of sulfuric acid. Also, sulfuric acid

Biotechconcrete: An innovative approach for concrete with ...

Jan 01, 2013· The importance of concrete durability in the context of the eco-efficiency of construction materials has been rightly put by Mora (2007), when he stated that increasing its durability from 50 to 500 years would mean a reduction of its environmental impact by a factor of 10. The importance of concrete durability for their eco-efficiency has also ...

An Experimental Study on Performance of Bacteria in Concrete

Dec 28, 2014· is a digital publishing platform that makes it simple to publish magazines, catalogs, newspapers, books, and more online. Easily share your publications and get them in front of 's ...

Effect of Recycled PET (Polyethylene Terephthalate) on the ...

Nov 13, 2019· Most of the concrete deterioration mechanisms require the access of aggressive agents from the environment. Thus, concrete transport properties are one of the governing factors in concrete durability. Afterwards, chemical reactions between aggressive agents and concrete constituents also play an important role .

National Institute of Technology | Warangal

P.Rathish Kumar etal (2009),"Resistance of standard grade Self Compacting Concrete and Normal Concrete to Acid Attack", Vol 4, No 12, 2009 pp 2459-2468, International Journal of Applied Engineering Research, Research India Publications, ISSN 0973-4562, pp 2459-2468. Peer Review. 67

Experimental Investigation on Self Compacting Concrete by ...

silica, Acid resistance, Sulphate resistance test, Acid resistance test. This Self-compacting concrete (SCC) was first ... durability of cement concrete is defined as its ability to resist weathering action, chemical attack, abrasion or any other ... of standard grade SCC and it is 31% addition in case of high strength SCC. II. METHODOLOGY