Admixtures and additives for concrete

Concrete additives include fine grained and inorganic additives. Their introduction to the mix is intended to enhance the properties of the concrete or to obtain new ones. Additives can be divided into two types.

(PDF) Study of Concrete Properties using Bone …

The mixture of Rice Husk Ash and Bone Powder were used as partial replacement for cement in concrete structures. In this paper, the replacement varied from 5% to 20% in a mix of 1:2:4.

Concrete Technical Article

Concrete Additives for Recycled Aggregate Concrete In addition to the production and use of cement-based products, the recycling and effective use of demolished concrete aggregate represents an opportunity for further environmental benefits to the construction industry. In the UK alone more than 50 million tonnes of concrete

Ultrahigh Performance Nanoengineered Graphene–Concrete …

An acceleration voltage of 10 kV, a magnification of ×20 000, and a beam current of 0.13 nA were used. Cubes' Preparation and Testing: To prepare the concrete cube samples, ordinary Portland cement Type II, fine dry sand, and 10 mm coarse aggregate were used with a ratio of 1:2:3, respectively. The water/cement ratio for all …

(PDF) INFLUENCE OF CHEMICAL POLYMER ADDITIVE ON …

For the experimentation a total 33 numbers of plain cubes of size 150mm×150mm×150mm along with 4 normal concrete cubes were cast and tested. The compressive strength was optimum for the ...

Durability Studies on Fly Ash Based Geopolymer Concrete

The proportions of coarse aggregate, superplasticizer, and alkali-activated solutions used in the geopolymer concrete mixes were 1189 kg/m 3, 3.8 kg/m 3, and 171 kg/m 3, respectively.The coarse aggregate and water used in the conventional concrete mix were 1189 kg/m 3 and 171 kg/m 3, respectively.From Table 3, it is observed that …

A Novel Method on the Effect of Natural Additive on Cube Crack

The kaolin and bentonite have been mixed in equal quantity and treated by heat for 1 hour under 600 ºC, 800 ºC and 1000 ºC to create new minerals under high temperature condition to introduce ...

Role of Concrete Curing

Curing plays an important role on strength development and durability of concrete. Curing takes place immediately after concrete placing and finishing, and involves maintenance of desired moisture and temperature …

Effect of Metakaolin and MC Adhesive Additives on the

3.1 Compressive Strength. Concrete cubes measuring 70 × 70 × 70 mm were tested for strength at the age of 7 and 28 days. The compressive strength of the control specimens (without additives) is greatest and amounts to 37.0 MPa at the age of 7 days and 42.2 MPa at the age of 28 days (Table 2).When replacing 17.5% of cement with …

Sugarcane bagasse ash as alternate supplementary

Abstract. In this study, we examined the characteristics of sugarcane bagasse ash (SCBA) as a additional material in the mixture of concrete cubes. The additive material was collected from several sugarcane juice shop from Sathyamangalam and the bagasse get dried in sunlight for two days, sugarcane bagasse is burnt and ash …

A Review on Concrete Composites Modified with …

Recently, various nanomaterials have extensively been used to achieve sustainability goals in the construction sector. Thus, this paper presents a state-of-the-art review involving the uses of different …

Utilization of sawdust composites in construction—a review

2.3 Sawdust as other materials used in construction. Composite materials made of sawdust have long been used in building. For example, it has been applied for more than 40 years to produce sawdust concrete [].Other sawdust composites used in the building sector, according to literature, outside concrete include its use in particleboard, …

Effect of additives' ratios on workability and strength of self

Abstract and Figures. Self-compacting concrete (SCC) is a new and an emerging technology in the construction industry. SCC is highly workable concrete that can flow through congested reinforced ...

Keywords

2.2.1 Mix Proportion for Concrete Cubes . For durability studies, the British Standard mix proportion used in the mixes of conventional concrete was fixed as (1:2:4) after several trials. The water/cement ratio for the mixes was also 0.55%. The amount of plastic waste as additive was varied to assessits effects on the performance

Performance Using Bamboo Fiber Ash Concrete as Admixture …

The structural value of the bamboo fiber powder in a blended Portland cement was evaluated with consideration for its suitability in concrete. Varied percentage of bamboo fiber powder (BFP) at 0%, 5%, 10%, 15%, and 20% as an admixture in 1:2:4 concrete mixes. The workability of the mix was determined through slump; standard …

Mechanical properties and microstructure of High-Performance Concrete

Forty-five (45) concrete cubes of 150 mm by 150 mm by 150 mm and cylinders of 150 mm diameter by 300 mm depth were produced (9 each as control experiment and 36 each for the varying percentages of BLA). ... when Guinea Corn Husk Ash was used as additive for HPC. Also, BLA produced a lower strength in terms of …

Utilization of Plastic Bottle Waste in Concrete

The plastic fibers were added from 0.0% to 3.0%. The compressive strengths of concrete were determined after 28 days of curing period and compared with control concrete. Experiments done shows ...

Reduction of Radon Gas in Concrete Using Admixtures and Additives

This means roughly 1.5-2 mSv per year decrease in effective dose to a human using an additive or a supplementary cementitious material such as fly ash in relation to the investigated standard ...

carbon black as an additive in concrete | PDF

Concrete cubes and cylinders are cast depending on percentage ratio and it's effect is studied .After mixing carbon black powder and calcium sulphate as an additive in concrete,its properties like workability, setting time, bleeding, reactivity, hardness, shrinkage, etc. and other physical and chemical properties gets integrated.If they are ...

IRJET- Durability of Concrete When Tamarind Kernel Powder used as Additive

In this project our aim is to check the impact of TAMARIND KERNEL POWDER (TKP) over the durability properties of concrete when used as additives. Durability properties are studied using standard tests. ... For chloride attack test, 5% dilute Sodium Chloride solution is used. The cubes are immersed in solution for a period of 14 …

Developing Concrete using Sea Shell as a Fine Aggregate

production was investigated. Physical and mechanical properties of the shells are compared with well-graded river gravel. Concrete cubes were prepared using proportions of 1:0, 1:1, 1:3, 3:1 and 0:1 periwinkle shells to river gravel by its weight, as coarse aggregate. The periwinkle gravel concrete cubes were tested for its compressive strength.

Types of Admixtures & Additives for Concrete | DIY Doctor

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Concrete Admixtures

WebAdmixtures are used for one purpose: to improve some characteristics of the concrete. This section will include types of admixtures that can be used to provide the following results: …

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Usage potential and benefits of processed coconut shells in concrete …

In this experimental study, M30 grade of cement concrete is adopted and the mix was designed as per IS 10262 (2019) [27]. 72 cubes were cast to investigate workability, compressive strength, density, and micro-structural characteristics of the concrete.Initially, twelve cubes were cast confirming to M30 grade nominal mix (i.e., 0% …

Red mud as an additive in concrete: comprehensive

3.2 Mechanical properties of RM-based concrete. The dimensions of the concrete cubes and cylinders used for compressive strength and split tensile strength measurements were 150 × 150 × 150 mm 3 and 150 mm (diameter) and 300 mm (height) according to IS 516-2013 [] and IS 5816-1999 [], respectively.The compressive strength …

Review of the Effects of Supplementary Cementitious Materials …

2. Supplementary Cementitious Materials (SCMs) SCMs such as FA, GGBS, SF, RHA, SBA, and TDFA are typically added to concrete. Besides cost reduction and enhancement of the workability of fresh concrete, they can be successfully employed to improve the resistance of concrete to thermal cracking, alkali-aggregate reaction, …

Mechanical Properties of Concrete Exposed to Sulphate Attacks

scanning electron microscopy (SEM). A loss in weight of the concrete cubes and compressive strength was distinctly evident at the end of 56 and 90 days in both acids. Keywords: basalt aggregates; mineral additives; silica fume; fly ash; sulphate attack 1. Introduction Approximately 70–75% of concrete volume is composed of aggregates. …

(PDF) HUMAN HAIR AS FIBRE MATERIAL IN REINFORCED CONCRETE …

The current experimental study analyses the prospects of working on human hair as a fiber reinforcement substance by studying and testing on concrete cubes in compression testing machine so as to ...

Utilization of Saw Dust in Cement Mortar Cement Concrete

concrete separately, in this study, totally 16 mortar cubes & 48 concrete cubes are casted. And these are subjected to test, such as Slump test & Compressive test, then it is compared with normal mix of concrete & mortar. The application of saw dust mix for residential building structural member such as column, beam, slab

Mechanical Properties and Microstructure of Micro- and Nano-additives

The additives used in the investigation are nano-silica, fly ash, and silica fume. Nano-silica was obtained from Astra Chemicals Company, Chennai, India. ... For determining the compressive and tensile strengths of modified concrete composites, 150-mm cubes, cylinders of 150 × 300 mm, and prisms of 100 × 100 × 500 mm were cast …

Reduction of Radon Gas in Concrete Using Admixtures and …

Identical concrete cubes (150 × 150 × 150 mm) were cast and after demolding the cubes were cured in a water bath for one week. The cast cubes were thereafter stored in a conditioning room