scholarly journals Impact Resistance of Geopolymer Concrete Containing Recycled Plastic Aggregates

10.29007/nwsh ◽  
2018 ◽  
Author(s):  
Shemal Dave ◽  
Ankur Bhogayata ◽  
Dr. Narendra Arora
Keyword(s):  
Construction Material ◽  
Impact Resistance ◽  
Sustainable Construction ◽  
Geopolymer Concrete ◽  
Test Results ◽  
Waste Plastic ◽  
Drop Hammer ◽  
Fine Aggregates ◽  
Natural Aggregates ◽  
Excellent Improvement

This paper represents test results of impact resistance of geopolymer concrete (GPC) containing recycled plastic aggregates (RPA). Natural fine aggregates of 10mm size were partially replaced by RPA in varying proportions. Impact resistant offered by GPC was obtained by performing drop hammer test conforming to suggestions by ACI 544.2R-89. The test results revealed excellent improvement of impact resistance and energy absorption at 10% replacement of natural aggregates by RPA. The experimental evaluation of GPC modified by RPA, demonstrated potential for novel usage of waste plastic with GPC towards the development of sustainable construction material.

scholarly journals Mechanical Properties of Geopolymer Concrete Reinforced with the Natural and Waste Plastic Fibers

2020 ◽  
Vol 9 (7) ◽  
pp. 202-206
Keyword(s):  
Mechanical Properties ◽  
Tensile Strength ◽  
Natural Fibers ◽  
Splitting Tensile Strength ◽  
Sustainable Construction ◽  
Geopolymer Concrete ◽  
Waste Plastic ◽  
Test Conditions ◽  
Excellent Improvement

The flexural and splitting tensile strength were investigated on the specimens prepared with the geopolymer concrete (GPC) reinforced by the combined usage of coir and metalized plastic fibers. The combined addition of natural and artificial fibers has not been explored extensively into the GPC. The objective was to obtain the optimum combined dosage of the artificial and natural fibers to prepare a sustainable construction composite. The results showed excellent improvement of the properties of the GPC at the combined addition of 1% of the fibers for all test conditions.

scholarly journals Polyethylene Terephthalate (PET) Bottles Waste as Fine Aggregate in Concrete

2019 ◽  
Vol 8 (6S4) ◽  
Keyword(s):  
Natural Resources ◽  
Polyethylene Terephthalate ◽  
Construction Material ◽  
Fine Aggregate ◽  
River Sand ◽  
Recycled Pet ◽  
Pet Bottles ◽  
Fine Aggregates ◽  
New Construction ◽  
Natural Aggregates

Concrete construction industry is one of the major sector utilizing natural resources to produce concrete for building constructions. The rapid increase in building constructions and the demand for natural aggregates has resulted in depletion natural resources at an alarming rate. Uncontrolled mining activity worsens the situation. Thus serious awareness has been taken into consideration, has to be identified as a potential river sand substitution for fine aggregates replacement in concrete. For this review, utilizing recycled material are described as a fine aggregate replacement to river sand, particularly recycled Polyethylene Terephthalate (PET) bottles. Recycled PET Bottles are categorized as nonbiodegradable waste materials which are injurious to health. Recycled PET bottles in concrete are economical and help in reducing disposal problems. Recycled PET bottles are pondered as the best eco-friendly alternative not only for resolving the problem of disposal but as a new construction material for concrete

scholarly journals Development of Fly ash-GGBS based Self Compacting Geopolymer Concrete: a Review

2019 ◽  
pp. 373-377
Author(s):  
Vinothkumar A ◽  
Kalaivani M ◽  
Easwaran P
Keyword(s):  
Global Warming ◽  
Fly Ash ◽  
Construction Material ◽  
Cement Industry ◽  
Test Method ◽  
Sustainable Construction ◽  
Ring Test ◽  
Modern World ◽  
Geopolymer Concrete ◽  
By Products

Concrete is the most used construction material in construction Industries all over the world. The main binding ingredient of concrete that is ordinary Portland cement is a major contributor of global warming. The cement industry is the second largest producer of the green house gas. The total world production of cement is expected to be around 4800 Mt by 2030, which clearly indicates the like impact on global warming indicates. In this regard, Utilization of industrial by-products from various industries as supplementary cementations material in concrete along with cement has been well recognized for its enhanced properties and potential to reduce environmental impacts. Self compacting Geopolymer concrete is a relatively new concrete, which can be a sustainable and Economical construction material as it is produced from combination of industrial by-products such as Fly ash and Ground Granulated Blast Furnace Slag replacing 100% of cement in concrete. Self compacting Geopolymer concrete is a special type of concrete which can be placed and consolidated under its own weight without any vibration and which at the same time is cohesive enough to be handled without segregation or bleeding. The self compacting geopolymer concrete such as filing ability passing ability and segregation resistance are estimated by using slump flow, V-Funnel, L-Box and J-ring test method for fresh state concrete. Hence Self-compacting Geopolymer concrete is the sustainable construction material in the modern world by solving current issues of pollution.

Fracture Parameters of Fly Ash and GGBS Based Geopolymer Concrete

2015 ◽  
Vol 764-765 ◽  
pp. 1090-1094
Author(s):  
Tippabhotla D. Gunneswara Rao ◽  
P. Alfrite ◽  
G. Mallikarjuna Rao ◽  
Mudimby Andal
Keyword(s):  
Fly Ash ◽  
Construction Material ◽  
Bending Test ◽  
Geopolymer Concrete ◽  
Test Results ◽  
Conventional Concrete ◽  
Three Point Bending ◽  
Beam Depth ◽  
New Construction ◽  
Source Materials

Geopolymer concrete (GPC) is a new construction material in which cement is totally replaced by calcined source materials fly ash and GGBS. Geopolymer utilization reduces or eliminates the use of cement whose production produces a lot of carbon dioxide. Usually fly ash as a source material for the geopolymer. The behavior of GPC has to be studied in detail to check its suitability in construction industry. In the present study, the fracture behavior of geopolymer concrete is investigated and compared. Three-point bending test on notched prisms with a/d (notch depth/beam depth) ratios 0.1, 0.15, 0.2 are considered. The values of Critical load, fracture toughness, fracture energy and ductility are presented. The test results of total of 27prisms, 6cubes, 18 cylinders with M30 grade geopolymer concrete and conventional concrete (OPC) of same grade are presented in this paper. The test results indicated that the characteristic length of GPC is about 25% more than that of conventional concrete.

Behaviour of Fly Ash and Rice Husk Ash Based Geopolymer Concrete

2018 ◽  
Vol 775 ◽  
pp. 596-602
Author(s):  
Saraswati Verma ◽  
Mayank Kumar
Keyword(s):  
Fly Ash ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Construction Material ◽  
Sustainable Construction ◽  
Geopolymer Concrete ◽  
Waste Products ◽  
Ambient Exposure ◽  
Heat Curing ◽  
Naoh Solution

Geopolymer Concrete (GPC) is a novel concrete which has evolved in recent decades. It uses industrial waste products like fly ash (FA), ground granulated blast slag (GGBS), Rice husk ash (RHA), micro-silica, and red mud etc., from industries, with alkaline liquids to replace cement in concrete by 100%, thereby developing an eco-friendly and sustainable construction material and simultaneously reducing waste disposal problem of fly ash and rice husk ash. GPC not only possesses excellent mechanical properties it also have very good durability properties. This paper presents the effect of partial replacements of fly ash with rice husk ash on the properties of geopolymer concrete. Mixes chosen for investigation were GPC-1, GPC-2, GPC-3, GPC-4, and GPC-5 containing respectively 0%, 5%, 10%, 15%, and 20% RHA in place of FA. Various synthesis parameters like alkaline liquid to source material ratio, molarity of NaOH solution, sodium silicate to sodium hydroxide ratio were kept at their optimum values of 0.45, 12M, and 2.5 respectively. Heat curing was given to specimens by dry oven curing for initial 24 hours at a specified temperature of 70°C, and then ambient exposure was given to the test specimens for periods of 3, 7, 28, and 90 days respectively. Results of tests conducted have been discussed in detail.

scholarly journals Studies on Mechanical properties of High Calcium Fly ash based sustainable Geopolymer concrete

2021 ◽  
Vol 2070 (1) ◽  
pp. 012184
Author(s):  
B Vijaya Prasad ◽  
N Anand ◽  
P D Arumairaj ◽  
M Sanath Kumar ◽  
T Dhilip ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Compressive Strength ◽  
Fly Ash ◽  
Construction Material ◽  
Sustainable Construction ◽  
Geopolymer Concrete ◽  
Conventional Concrete ◽  
High Calcium ◽  
Major Interest ◽  
High Calcium Fly Ash

Abstract Geopolymer concrete (GPC) is a Sustainable construction material, in which cement is completely replaced by Fly ash as binder. To control emission of CO2 during the production of cement, it is advisable to use alternate sustainable Cementitious material. The development of GPC become a major interest to use for in-situ and precast applications. The present study aims to develop High calcium fly ash based GPC with aid of alkaline liquids such as sodium Hydroxide (NaOH) and Sodium silicate (Na2SiO3). Different molarities i.e 4M, 6M, 8M and 10M are used to develop the GPC under ambient and oven curing process. In the present investigation the Fresh properties of GPC and Mechanical properties such as compressive strength, Tensile strength, Flexural strength and Elastic modulus of GPC are investigated. An increase of alkaline activator in in the mix decreased the workability of GPC. The developed GPC mix of 8M is found to be the optimum for gain in compressive strength. A polynomial relationship is obtained for the mechanical properties of GPC developed under ambient and oven curing. The development cost of GPC can be reduced up to 11.25 to 16.5% as compared with conventional concrete grade of M25.

scholarly journals Effect of Utalization of Natural Aggregates by Rap Aggregates And Cement By GGBS in Alkali Activated Concrete Pavement

2019 ◽  
Vol 8 (3) ◽  
pp. 3813-3819
Keyword(s):  
Concrete Pavement ◽  
Geopolymer Concrete ◽  
River Sand ◽  
Rigid Pavement ◽  
Complete Replacement ◽  
Coarse Aggregates ◽  
Fine Aggregates ◽  
Natural Aggregates ◽  
Alkali Activated Concrete ◽  
Alkali Activated

Coarse aggregates and cement are the main constituents of the concrete in the rigid pavement structure. The procurement and generation of natural aggregates are getting difficult day by day because of a lack of natural resources. Search for alternatives to natural coarse and fine aggregates leads to the usage of Reclaimed Asphalt Pavement aggregates, which are produced abundantly due to the replacement of flexible pavement with the rigid pavement. Ground Granulated Blast Furnace Slag (GGBS) is a waste material/by-product from steel and iron industries that can be used as an alternative binder in the alkali enacted system in place of cement. This study is taken up to determine the physical properties of materials, strength parameters and durability aspects of alkali-activated concrete are studied with GGBS which is the complete replacement for cement. The RAP aggregates are procured from KR market flyover Bangalore. And it is checked in the effective utilization in geopolymer concrete pavements. RAP fine aggregates and RAP coarse aggregates are partially replaced with river sand and natural aggregates with a variation of 100%, 75%, 50%, and 25% for M40 grade of concrete. Na2O dosage of 4.5% and activator modulus of 1.25 is taken and kept constant throughout the study. The cubes, cylinders and beams were casted and tested for strength. And fatigue test and non destructive test such as ultrasonic pulse velocity and rebound hammer test is conducted. The results can be analyzed to identify the importance of RAP fine aggregates and RAP coarse aggregates in the geopolymer concrete pavement for its effective usage for present scenario. Concluding all the test results the replacement of 25% RAP coarse aggregates and 50% RAP fine aggregates giving more strength than normal concrete which can be used for pavement construction

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