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International Journal of Recent Technology and Engineering (IJRTE)
ISSN: 2277-3878 (Online), Volume-9 Issue-1, May 2020
Impact Resistance For Ready Mix Concrete
Plant Waste Concrete Aggregate
Abhay Shelar, Amit Mahindrakar
The static loading such as crushing shear failure
Abstract: The investigation to learn about the effect resistance examination is easy but due to Impact loading failure is a
for Ready Mix Concrete plant waste utilized in new concrete complicated active phenomenon. The static and impact
substitute of Natural aggregate. In concrete trade natural loading is RMC waste was observed to be beneficial
aggregate with RMC plant waste of 7 days old waste concrete circumstances. In the infrastructure construction impact
aggregate in 20% interval up to 100%. In the impact testing resistance of concrete considered in the current locations.
machine a drop weight was developed to govern impact resistance Test conducted as per ACI committee 544 recommended
on Natural Aggregate concrete & RMC plant waste aggregate guideline about the impact resistance of RMC projectile test,
concrete. In aspect ratio (l/d) as 60 conducted Impact test on NAC explosive test and fall weight test.
& RMC waste. The samples of M40 strength of concrete. The
Impact test conducted on samples as per ACI-544 committee The striking method recommended by the ACI committee
method and verified by drop weight methods. RMC waste concrete 544 between them drop weight is simplest, RMC Probably,
aggregate exhibited with variation of different percentage test measure impact resistance by considered significant features
results of impact strength energy. The impact resistance
significantly increases by additions of RMC plant waste concrete for blows number among the“impact repeated”. Impact
aggregate. resistance is of has been in a test to attain a given distress level
in the test of sample considered by measure. The level of
Keywords : RMC plant waste concrete, Impact resistance, New distress is finding by “repeated impact” of blows in a number
concrete on a given sample to find, impact resistance in RMC plant
I. INTRODUCTION waste aggregate is among the significant features. To study
improved mechanical replies and ductility on RMC plant
This Concrete is a basically brittle element and sustain high waste concrete aggregate study. By adding of RMC waste is
compressive loads but fragile in tensile and loads. On the un-hydrated cement partials, fly ash & silica hydrated with
surface of concrete due to heavy objects loads are exposed fresh cement in concrete advances the effect and fracture that
susceptible to harm effect principally arises at edges. The are administered by durability features on concrete. The
concrete life span decreases due Impact loads damage is a absorption energy volume and post peak ductility on RMC
chief reason and which finally leads to major replacement in plant waste concrete contain un-hydrated cement particles,
any concrete structures. The structural Engineers are micro silica bridges their widening these cracks and restrain
confirming structures about static loading but facing a and thus expand. The analytical and experimental evaluation
problem suffering from on impact loads. For short duration can be determined from the Toughness. ACI committee 544
several concrete structures are frequently exposed to dynamic has been explaining equipment and procedures repeated drop
loads. These impact initiate from bases of machine vibrations, weight impact test issued. This report produces to required
wind storms on foundations. The structural reaction and the number of blows source a specific level of distress in RMC
mechanical properties of component materials examine and waste concrete aggregate RMC specimen. The aim for current
forecast the loading reserve capacity of strain at such high of work was to learn behaviour of RMC waste under impact
rates. loading with varied 20 % of RMC waste. Impact energy was
evaluated simple the using inexpensive impact testing
machine fall weight.
II. EXPERIMENTAL PROGRAM
A. Material Properties
Manuscript received on April 02, 2020.
Revised Manuscript received on April 15, 2020. 2.1 Cement
Manuscript published on May 30, 2020.
* Correspondence Author OPC of 53 grades confirming to IS 12269: 2013. Its
Abhay Shelar, Research Scholar, Department of Civil Engineering, Properties such as Physical are 4.9%Fineness, 3.15Specific
VIT Vellore, Tamil Nadu, India. Gravity, 33 % Standard Consistency, 58 min Initial setting
Dr Amit Mahindrakar Professor, Department of Civil Engineering,
VIT Vellore Time, 532 min Final Setting Time, Compressive Strength
Vellore Institute of Technology, [VIT University], Vellore, Tamil Nadu, 53.24 MPa
India.
© The Authors. Published by Blue Eyes Intelligence Engineering and
Sciences Publication (BEIESP). This is an open access article under the CC
BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Retrieval Number: A2743059120/2020©BEIESP Published By:
DOI:10.35940/ijrte.A2743.059120 2311 Blue Eyes Intelligence Engineering
Journal Website: www.ijrte.org & Sciences Publication
Impact Resistance For Ready Mix Concrete Plant Waste Concrete Aggregate
2.2 Fine Aggregate:
Locally available Stream sand & crushed RMC waste
concrete aggregate fine aggregate was used as which
confirms to zone II of IS 383-1983. Stream sand surface is
smooth and rounded, Crushed sand is angular in shape and
rough in surface & RMC waste concrete fine aggregate
attached with unhydrated cement particles. The specific
gravity of River, crushed & RMC waste sand, is 2.83, 2.86 &
2.72.
Fineness modulus of River, crushed & RMC waste sand fine
aggregate is 2.65, 2.78 and 2.96
2.3 Coarse Aggregate IV. IMPACT TEST
Crushed angular metal from a local source & RMC waste The impact resistance of the samples was calculated
concrete aggregate was used as coarse aggregate having size by the process 544.2R-89 by ACI committee. The specimen
ranging from 10 mm to 20 mm. The coarse aggregate Sp. of diameter 150mm and length 60mm concrete cylindrical
gravity of is 2.71 & 2.73. Fineness modulus is 6.45 &6.74. discs impact test was carried out. The cylindrical nine
Water absorption is 0.65% & 1.35 % number of disc tested specimens were and find number of
2.4 Mixing and Curing Water: average blows to attain essential result in first crack and
ultimate failure on concrete standard sample moulds
Potable Municipal corporation water used for curing and specimens by making use of pipes and Metal sheets.
mixing in concrete. The hammer of 135 N dropped continually 457 mm
III. MIX PROPORTIONS height from a steel ball 63.5 mm, was applied impact load
on concrete disc at the centre of surface Figure-1& 2 Fall
In the experimental work Near about Pune 7 days old RMC weight Impact testing machine
plant waste collected and crushed according to fine & coarse
aggregate. Natural River and crushed sand is used. OPC of 53
grade and potable water is used for mixing. As per IS standard
mix proportion was prepared. Replace with Natural Fine &
Coarse aggregate in 20% interval up 100% as shown in Table
1 for M30 Grade concrete & Table 2 for M40 Grade concrete
Indispensable in dry mix water amount concrete existed
mould and by mechanical vibrator the compaction was done.
After 24 hours, the samples was removed from moulds & 28
days place in water for curing. Afterward at an age of samples
28 days were testing for permitted.
TABLE 1 MIX PROPORTIONS OF M30 GRADE
CONCRETE Figure-1 Impact testing machine of fall weight setup
TABLE 2 MIX PROPORTIONS OF M40 GRADE
CONCRETE
Figure-2 Drop weight Impact testing machine
Retrieval Number: A2743059120/2020©BEIESP Published By:
DOI:10.35940/ijrte.A2743.059120 Blue Eyes Intelligence Engineering
Journal Website: www.ijrte.org 2312 & Sciences Publication
International Journal of Recent Technology and Engineering (IJRTE)
ISSN: 2277-3878 (Online), Volume-9 Issue-1, May 2020
V. IMPACT TEST RESULTS AND DISCUSSION and the impact resistance in terms of impact energy are
The samples after 28 days curing period Impact was shown in a table. The sample produced delivered impact
carried out conflict . The first crack and fracture final on energy to the by blow of each is considered
concrete plain as well as RMC of different percentage waste
concrete with of volume fraction required number of blows
Table 3 IMPACT TEST RESULTS
Grade of Mix First Crack Failure of Absorption of Absorption of Ductility
Concrete for Number of Number Energy Energy Index
Blows Blows for for (E1/E2)
the First the final
Crack(E1) failure
kNm (E2) kNm
NAC 25 30 1.54 1.85 0.83
RMC 20 26 31 1.60 1.91 0.84
M30 RMC 40 28 33 1.73 2.04 0.85
RMC 60 32 35 1.97 2.16 0.91
RMC 80 35 38 2.16 2.34 0.92
RMC 100 37 42 2.28 2.59 0.88
NAC 31 33 1.91 2.04 0.94
RMC 20 33 34 2.04 2.10 0.97
M40 RMC 40 36 38 2.22 2.34 0.95
RMC 60 39 42 2.41 2.59 0.93
RMC 80 42 46 2.59 2.84 0.91
RMC 100 44 49 2.71 3.02 0.90
VI. 6. RESULTS AND DISCUSSIONS
By addition of 7 days old RMC waste replace with
Natural Fine & Coarse aggregate in 20% interval up to
100% for M30 & M40 grade concrete. It was observed in
Figure 3 for M30 & Figure 7 number of blows for M40
grade concrete for first crack shows more number blows
required with increase in RMC waste concrete aggregate. It
also observed in Figure 4 for M30 & Figure 8 for M40
grade concrete number of blows for failure shows more
number blows required with increase in RMC waste
concrete aggregate. The energy absorption for first crack is
shown in Figure 5 shows for M30 grade concrete & Figure Figure 4 M30 Concrete Number of Blows For Failure
9 shows for M40 grade concrete. M30 Grade concrete
energy absorption for final Failure 6 & M40 Grade concrete
energy absorption for final Failure 10
Figure 3 Test Results of M30 concrete for first crack Figure 5 M30 concrete energy absorption for First Crack
number of blows
Retrieval Number: A2743059120/2020©BEIESP Published By:
DOI:10.35940/ijrte.A2743.059120 2313 Blue Eyes Intelligence Engineering
Journal Website: www.ijrte.org & Sciences Publication
Impact Resistance For Ready Mix Concrete Plant Waste Concrete Aggregate
Figure 9 M30 concrete energy absorption for First Crack
Figure 6 M30 concrete energy absorption for final
Failure
Figure 10 M40 concrete energy absorption for final
Failure
RMC waste contain un-hydrated cement particles,
fly-ash, micro silica. Water and cement primarily result in
that a paste of cement starts and to counter toughens. The
aggregate particles paste binds by hydration of organic
development. In the process of hydration of cement, occur
Figure 7 Test Results of M40 concrete first crack number chemical changes gradually, ultimately forming fresh
of blows translucent produces, heat development, and other
assessable symbols. Pozzolanic is Fly ash , which suggests
that it's a siliceous substantial that reacts with cement form
calcium hydroxide. The calcium silicate produces when
cement reacts with water in a hydrated lime. The fly ash
reaction in concrete with lime augments strength. In the
cement hydration calcium hydroxide reacts
Sodium silicate in the presence of water to form a gel-the
calcium silicate hydrate
VII. CONCLUSIONS
On the basis of investigational outcomes, the subsequent
inferences are strained.
1 Impact resistance increase in percentage of RMC waste
Figure 8 Test Results of M40 Grade concrete number of rises in the concrete mix was realized.
blows for failure 2 The first visible crack and final fracture impact resistance
also increased against, which means absorption capacity that
the energy in concrete with RMC plant waste concrete
aggregate increased.
3 RMC waste has 7 days old has unhydrated, Flyash, Micro
silica reacts with new cement added in mix and bind the
particles. Due to this reason energy absorption increases.
Retrieval Number: A2743059120/2020©BEIESP Published By:
DOI:10.35940/ijrte.A2743.059120 Blue Eyes Intelligence Engineering
Journal Website: www.ijrte.org 2314 & Sciences Publication
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