IRJET- Experimental Investigation of Self Compacting and Self Curing Concrete with Different Admixture
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This document presents an experimental investigation of self-compacting and self-curing concrete with different admixtures. The objective is to study the strength of concrete using a combination of self-compacting and self-curing properties. Tests were conducted on various materials used in concrete including cement, fine aggregate, coarse aggregate, water, Conplast SP430 superplasticizer, and Polyethylene Glycol 400 as a self-curing agent. Concrete mixtures were prepared with different dosages of admixtures and cured without external curing. Compressive strength tests were performed on specimen cubes to analyze the effects of self-compacting and self-curing properties on concrete strength.
![International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056
Volume: 05 Issue: 12 | Dec 2018 www.irjet.net p-ISSN: 2395-0072
© 2018, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 482
micron25 mm or 40 mm bristle brush Thus from the results
we infer that the fineness of the cement is 28.50%
5. MIX DESIGN CALCULATION
5.1 CONCRETE MIX DESIGN CALCULATION FOR M25
GRADE WITH PROCEDURE
Concrete mix design is required to gain target strength in
structures.
Concrete mix design of M25 grade of concrete can be
calculated.
DATA REQUIRED FOR CONCRETE MIX DESIGN
(i) Concrete mix design stipulation
a). Characteristic compressive strength
required in the field at 28DAYS grade
designation – M25
b). Nominal maximum size of aggregate –
20MM
c). Shape of coarse aggregate – angular
d). Degree of quality control available at site –
as per is:456
e). Type of exposure the structures will be
subjected to (as defined in is:456) – mild
f). Type of cement : psc conforming is:455
(ii) Test data of material ( to be determined in
laboratory)
a). Specific gravity of cement = 3.15
b). Specific gravity of fine aggregate = 2.64
c). Specific gravity of coarse aggregate = 2.84
d). Fine aggregate confirm to zone ii of is – 383
5.2 ESTIMATION OF MIX INGREDIENTS
a) Volume of concrete = 1 m3
b) Volume of cement = (383.2 / 3.15)
x (1/1000)
= 0.122 m3
c) Volume of water = (191.6/1) x (1/1000)
= 0.1916 m3
d) Volume of total aggregate = 1 – (0.122 + 0.1916)
= 0.6864 m3
e) Mass of coarse aggregate = 0.6864 x 0.589 x 2.84 x
1000
= 1148.18 kg/m3
f) Mass of fine aggregate = 0.6864 x 0.442 x 2.64 x
1000
= 800.95 kg/m3
6. CONCLUSIONS
To find the self curing and self compacting properties of
concretethe preliminary tests formaterialswereconducted.
It is obtained that, specific gravity of cement 3.15, fineness of
cement is 28.5%,specific gravity of coarse aggregate
2.54,specific gravity of fine aggregate 2.64, proper mix for
adding various percentage of chemicals is designed.
REFERENCES
[1] Mr.Sanjay raj A , Yogananda N ; “ Experimental
investigation on self curing and self compacting
concrete by replacing natural sand by M-sand and
coarse aggregate by light weight aggregate for M40
grade concrete”- REVA institute of technology and
management Bangalore, Volume 4, issue No.8
August 2014.
[2] Riaz ahamed K , Pradeep Kumar A, Durai
priyadharsini, Kalaivani K, Kingsta Beautline M “
Experimenal study on self curing concrete using
Sodium Ligno sulphate, International journal of
emerging technologies and engineering, Volume 2,
issue No.4 April 2015.
[3] Mr. Ramaloghar,Mr.Bhagwatduokar,Mr.Ambadass
kale “ A Study on internal curing of self compacting
concrete using admixtures PEG400 and Super
plasticizers. International journal of science
technology and management Volume 5, issue No.12
December 2016.
[4] Mr.H,j.h Brouwers,H.j Redix. This paper addresses
experiments and theories on Self-Compacting
Concrete. First, the features of “Japanese and
Chinese Methods” are discussed, in which the
packing of sand and gravel plays a major role.
Mr.J,M.Khatib. The influence of including fly ash
(FA) on the properties of self-compacting
concrete (SCC)isinvestigated. Portlandcement (PC)
was partially replaced with 0–80% FA.Thewaterto
binder ratio was maintained at 0.36 for all mixes.
Properties included workability, compressive
strength, ultrasonic pulse velocity
(V), absorption and shrinkage.](https://image.slidesharecdn.com/irjet-v5i1290-181229053424/85/IRJET-Experimental-Investigation-of-Self-Compacting-and-Self-Curing-Concrete-with-Different-Admixture-4-320.jpg)
IRJET- Experimental Investigation of Self Compacting and Self Curing Concrete with Different Admixture
- 1. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 12 | Dec 2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 479 Experimental Investigation of Self Compacting and Self Curing Concrete with Different Admixture Mr. Afsal Kallengal1 1M.E Structural Engineering, Department of Civil Engineering, RVS Campus, Coimbatore, India ---------------------------------------------------------------------***---------------------------------------------------------------------- Abstract :- A self-compacting concrete (SCC)istheonethat can be placed in the form and can go through obstructions by its own weight and without the need of vibration. . The major advantage of this method is that SCC technology offers the opportunity to minimize or eliminate concrete placement problems in difficult conditions. Therefore, theobjectiveof this study is to investigate the strength of concrete by both the combination of self compacting and self curing of concrete. Key Words: Self compacting concrete, Curing, Polyethylene glycol, Conplast SP430, Compressive Strength 1. INTRODUCTION These days apart from steel, concrete is the most and widely used as structural material in construction field. Concrete defined as a composite material made up of composed granular material (the aggregate or filler) embedded in a hard matrix of material (cement or binder) and water that fills the space between theaggregateparticlesandbind them together. There are many types of concrete with different material used and mix design. Along with the compaction, curing plays a predominant role inachievingbetterstrength, durability, water tightness, abrasion resistance, volume stability and resistance to freezing and thawing. Curing is a major factor which is important for the hydration process to continue particularly in the initial ages. However, adequate curing is not always possible by conventional curing techniques and it is recommended to make the embedded water available for curing in order to overcome this problem. 1.1 Experimental Procedure The different methods used in this research include the following: (i) Background study Literature survey was carried out to check previous studies related to this thesis. (ii) Collection of raw Materials All the materials were collected and delivered to the laboratory. These are Cement, Fine Aggregate, Coarse Aggregate, Conplast SP430, and Polyethylene Glycol. (iii) Materials Tests Tests were conducted on the materialstodeterminetheir properties and suitability for the experiment. (iv) Mix Proportioning (Mix Design) Concrete mix design was prepared using the Indian Standard Code method. M25 design is prepared with code. (v) Specimen Preparation The concrete cube specimens were prepared in the laboratory. (vi) Testing of specimens Laboratory tests were carried out on concrete samples. The test conducted for compressive strength. (vii) Data Collections This was mainly based on the tests conducted on the prepared specimens in the laboratory. (viii)Data Analysis and Evaluation The test results of the samples were compared with the respective control concrete properties and the result were presented using tables, pictures. Conclusions and recommendations were finally forwarded based on the findings and observation. 1.2 MATERIALS USED 1.2.1 CEMENT There are two requirements for any cement in the concrete mix design. That is compressive strength development with time attainment of appropriate rheological characteristics, type and production of cement. Table 1.1 Properties of Cement PROPERTIES STANDARD VALUES OPC USED IN PRESENT STUDY Standard consistency 30-35 34% Initial setting time >30 min 38min 12sec Final setting time < 600min 560min Fineness 25-35% 28.50%
- 2. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 12 | Dec 2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 480 1.2.2 FINE AGGREGATE The fine aggregate used in manufacturingofconcreteshould be free from debris, fungi and chemical attack. Itplaysa vital role in concrete, so it should durable, angular and sharp edges then only it gives a rich mix concrete and workability. Table 1.2 Properties of Fine Aggregate PROPERTIES RESULTS STANDARD VALUES Specific Gravity 2.56 2.30 – 2.60 Fineness Modulus 2.74 2.50 – 3.50 Bulk Density 17 kN/m3 - Bulking Fine grade 1.2.3 COURSE AGGREGATE Aggregates are the important constituents in concrete.They provide body to the concrete, reduces shrinkage and effect economy. Earlier aggregates were considered as chemically insert materials but now it has been recognized that someof aggregates are chemically active and also that certain aggregate exhibit chemical bon at interface of aggregateand paste. That more aggregates occupy 70-80 percentage of concrete: their impact on various characteristics and properties of concrete is undoubtedly considerable. Table 1.3 Properties of Coarse Aggregate PROPERTIES RESULTS STANDARD VALUES Specific Gravity 2.78 2.6 – 2.9 Fineness Modulus 6.80 6 – 7 Bulk Density 16.50 kN/m3 1.2.4 WATER Water is an important in gradient of concrete as it activity participates in the chemical reactions with cement. The strength of cement concrete is mainly from binding action of the hydration of cement. It get the requirement of water should be reduced that requiredchemical reactionofunhydratedcementexcess water would end up in only formationundesirablevoids(or) capillaries in the hardened cement paste in concrete. Table 1.4 Properties of water PROPERTIES RESULTS STANDARD VALUES pH 6.70 Not less than 6 Organic 120mg/l 200mg/l Inorganic 1850mg/l 3000mg/l Sulphate 165mg/l 400mg/l Chlorides 1120mg/l 2000mg/l Suspended 620mg/l 2000mg/l 1.2.5 CONPLAST SP 430 It is a chloride free, super plasticizing admixture based on selected sulphonated naphthalenepolymers.Itissupplied as a brown solution which instantlydilutes in water.Toprovide excellent acceleration of strength at all ages by significantly reducing water demands in a concrete mix. It has been formulated to get high water reductions upto 25% without loss of workability or to produce high quality concrete of reduced permeability. It makes possible major reduction in w/c ratio which allows production of high strength concrete without excessive cement concrete. It increases workability levels are maintained longer than other super plasticizers admixture. It improves cohesion and particle dispersion minimizes segregation bleeding and pumpability. It permits easier constructionwithquickerplacingandcompactionand it reduces labor cost with increasing water content.Weused the chemicals with the percentage of weightofthecementas 0.1%, 1%, 1.5%, 2%. Fig 1. Conplast SP 430 1.2.6 POLY ETHYLENE GLYCOL 400 Polyethylene glycol (PEG) of molecular weight 400 (PEG 400) for dosages ranging between 0.1 to 1% by weight of cement added to mixing water. The optimum dosage of PEG-400 for providing maximum strength was observed to be 1%. The optimum dosage of PEG-400 for providing maximum strength was observed to be 1%. POLYETHYELENE GLYCOL(PEG) of average molecular weight (M.W) from 200 to 10000 as self curing agent and to
- 3. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 12 | Dec 2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 481 decide the optimum dosage for different curing condition under air atmospheric conditions and to study the compressive strength and water retention by varying the percentage of PEG from 0% to 1% by weight of cement for self-compacting and compare it with conventional SCC. Concrete weight loss with time measured to determine the water retention capacity. In this experiment we using strength of self-curing concrete by adding POLYETHYLENE GLYCOL(chemical admixture) at 3%, 3.5%, 4%, 4.5% and also comparing with conventional concretetostudythecompressivestrengthand split tensile strength. Fig 2. Polyethylene Glycol 400 2. TESTS FOR COURSE AGGREGATE 2.1. Specific gravity test This test is done to determine the specific gravity of coarse aggregate by density bottle method. Specific gravity is the Ratio of the weight in air of a given volume of a material at a standard temperature to the weight of an equal volume of distilled water at the same stated temperature. Table 2.1 Specific gravity test for coarse aggregate 3. TEST FOR FINE AGGREGATE 3.1 Specific gravity test for fine aggregate This experiment is done to determine the specific gravity of fine grained sand by densitybottle method.Specificgravityis the Ratio of the weight in air of a given volume of a material at a standard temperaturetotheweightofanequalvolumeof distilled water at the same stated temperature. Table 3.1 Specific gravity test for fine aggregate 4. TEST FOR CEMENT 4.1. SPECIFIC GRAVITY OF CEMENT This experiment is done to determine the specific gravity of the cement by density bottle method. Specific gravity is the Ratio of the weight in air of a given volume of a material at a standard temperature to the weight of an equal volume of distilled water at the same stated temperature. Table 4.1 Specific gravity test for cement 4.2 FINENESS TEST Fineness of cement is a relative measure of particle size. The fineness of cement has an important bearing on the rate of gain of strength and also on the rate of evolution of heat.Finer cement offers a greater surfaceareaforhydration and hence the faster andgreaterthedevelopmentofstrength. Maximum numberofparticlesinthesampleofcementshould have a size less than 90 micron. The smallest particle may have a size of 1.5 micron. An average size of the cement particles may be taken as 10 micron. To find the fineness of the given cement the equipments required are, IS sieve 90
- 4. International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 12 | Dec 2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 7.211 | ISO 9001:2008 Certified Journal | Page 482 micron25 mm or 40 mm bristle brush Thus from the results we infer that the fineness of the cement is 28.50% 5. MIX DESIGN CALCULATION 5.1 CONCRETE MIX DESIGN CALCULATION FOR M25 GRADE WITH PROCEDURE Concrete mix design is required to gain target strength in structures. Concrete mix design of M25 grade of concrete can be calculated. DATA REQUIRED FOR CONCRETE MIX DESIGN (i) Concrete mix design stipulation a). Characteristic compressive strength required in the field at 28DAYS grade designation – M25 b). Nominal maximum size of aggregate – 20MM c). Shape of coarse aggregate – angular d). Degree of quality control available at site – as per is:456 e). Type of exposure the structures will be subjected to (as defined in is:456) – mild f). Type of cement : psc conforming is:455 (ii) Test data of material ( to be determined in laboratory) a). Specific gravity of cement = 3.15 b). Specific gravity of fine aggregate = 2.64 c). Specific gravity of coarse aggregate = 2.84 d). Fine aggregate confirm to zone ii of is – 383 5.2 ESTIMATION OF MIX INGREDIENTS a) Volume of concrete = 1 m3 b) Volume of cement = (383.2 / 3.15) x (1/1000) = 0.122 m3 c) Volume of water = (191.6/1) x (1/1000) = 0.1916 m3 d) Volume of total aggregate = 1 – (0.122 + 0.1916) = 0.6864 m3 e) Mass of coarse aggregate = 0.6864 x 0.589 x 2.84 x 1000 = 1148.18 kg/m3 f) Mass of fine aggregate = 0.6864 x 0.442 x 2.64 x 1000 = 800.95 kg/m3 6. CONCLUSIONS To find the self curing and self compacting properties of concretethe preliminary tests formaterialswereconducted. It is obtained that, specific gravity of cement 3.15, fineness of cement is 28.5%,specific gravity of coarse aggregate 2.54,specific gravity of fine aggregate 2.64, proper mix for adding various percentage of chemicals is designed. REFERENCES [1] Mr.Sanjay raj A , Yogananda N ; “ Experimental investigation on self curing and self compacting concrete by replacing natural sand by M-sand and coarse aggregate by light weight aggregate for M40 grade concrete”- REVA institute of technology and management Bangalore, Volume 4, issue No.8 August 2014. [2] Riaz ahamed K , Pradeep Kumar A, Durai priyadharsini, Kalaivani K, Kingsta Beautline M “ Experimenal study on self curing concrete using Sodium Ligno sulphate, International journal of emerging technologies and engineering, Volume 2, issue No.4 April 2015. [3] Mr. Ramaloghar,Mr.Bhagwatduokar,Mr.Ambadass kale “ A Study on internal curing of self compacting concrete using admixtures PEG400 and Super plasticizers. International journal of science technology and management Volume 5, issue No.12 December 2016. [4] Mr.H,j.h Brouwers,H.j Redix. This paper addresses experiments and theories on Self-Compacting Concrete. First, the features of “Japanese and Chinese Methods” are discussed, in which the packing of sand and gravel plays a major role. Mr.J,M.Khatib. The influence of including fly ash (FA) on the properties of self-compacting concrete (SCC)isinvestigated. Portlandcement (PC) was partially replaced with 0–80% FA.Thewaterto binder ratio was maintained at 0.36 for all mixes. Properties included workability, compressive strength, ultrasonic pulse velocity (V), absorption and shrinkage.