Compaction of Concrete, concrete, removing air from fresh concrete, shape of concrete, Production of Concrete, Increasing strength of Concrete, Concrete Compaction, solidification of concrete, increasing density of concrete, avoiding honey combs in concrete, reducing porosity in concrete
This presentation is about the Compaction it's stages, its importance as well as Different types of Vibrators like Surface Vibrator, Beam Screed Vibrator, Roller Screed Vibrator, Plate Vibrator, Table Vibrator, their use, why to vibrate concrete, whats the effect of over vibration using needle vibrator in RCC and conclusion.
Concrete Technology, PPT Based On Unit 2 (Aggregates)
In this PPT you Can studied about Types of aggregates, its properties, and Laboratory testing on it.
By- Prof K.S.Somase
(Assistant professor of Gurukul Education society's Institute of engineering and technology, Nandgaon
Design of rigid pavements. IRC method of design of rigid pavement. Transportation Engineering. Civil Engineering. Wheel loads on rigid pavement. Action of various stresses on rigid pavement. Highway engineering. How rigid pavements different from flexible pavements
This presentation is about the Compaction it's stages, its importance as well as Different types of Vibrators like Surface Vibrator, Beam Screed Vibrator, Roller Screed Vibrator, Plate Vibrator, Table Vibrator, their use, why to vibrate concrete, whats the effect of over vibration using needle vibrator in RCC and conclusion.
Concrete Technology, PPT Based On Unit 2 (Aggregates)
In this PPT you Can studied about Types of aggregates, its properties, and Laboratory testing on it.
By- Prof K.S.Somase
(Assistant professor of Gurukul Education society's Institute of engineering and technology, Nandgaon
Design of rigid pavements. IRC method of design of rigid pavement. Transportation Engineering. Civil Engineering. Wheel loads on rigid pavement. Action of various stresses on rigid pavement. Highway engineering. How rigid pavements different from flexible pavements
For dam construction, two cofferdams are usually built, one upstream and one downstream of the proposed dam, after an alternative diversion tunnel or channel has been provided for the river flow to bypass the dam foundation area. These cofferdams are typically a conventional embankment dam of both earth- and rock-fill, but concrete or some sheet piling also may be used. Typically, upon completion of the dam and associated structures, the downstream coffer is removed and the upstream coffer is flooded as the diversion is closed and the reservoir begins to fill. Dependent upon the geography of a dam site, in some applications, a "U"-shaped cofferdam is used in the construction of one half of a dam. When complete, the cofferdam is removed and a similar one is created on the opposite side of the river for the construction of the dam's other half.
The cofferdam is also used on occasion in the shipbuilding and ship repair industry, when it is not practical to put a ship in drydock for repair or alteration. An example of such an application is certain ship lengthening operations. In some cases a ship is actually cut in two while still in the water, and a new section of ship is floated in to lengthen the ship. Torch cutting of the hull is done inside a cofferdam attached directly to the hull of the ship; the cofferdam is then detached before the hull sections are floated apart. The cofferdam is later replaced while the hull sections are welded together again. As expensive as this may be to accomplish, use of a drydock may be even more expensive. See also caisson.
A 100-ton open caisson that was lowered more than a mile to the sea floor in attempts to stop the flow of oil in the Deepwater Horizon oil spill has been called a cofferdam.[4] It did not work, as methane hydrates froze in the upper levels preventing the containment.
Aggregates: Review of types; sampling and testing; effects on properties of concrete, production of artificial aggregates.
Cements: Review of types of cements, chemical composition; properties and tests, chemical and physical process of hydration,Blended cements.Properties of fresh concrete - basics regarding fresh concrete –
mixing, workability, placement, consolidation, and curing,
segregation and bleeding
Chemical Admixtures: types and classification; actions and
interactions; usage; effects on properties of concrete
Mineral Admixtures: Flyash, ground granulated blast furnace slag,
metakaolin, rice-husk ash and
silica fume; chemical composition; physical characteristics; effects
on properties of concrete; advantages and disadvantages.
Proportioning of concrete mixtures: Factors considered in the design of mix . BIS Method, ACI method.,Properties of hardened concrete: Strength- compressive tensile
and flexure - Elastic properties - Modulus of elasticity - Creep-
factors affecting creep, effect of creep - shrinkage- factors affecting
shrinkage, plastic shrinkage, drying shrinkage, autogeneous
shrinkage, carbonation shrinkage ,Durability of concrete: Durability concept; factors affecting,
reinforcement corrosion; fire resistance; frost damage; sulfate
attack; alkali silica reaction; concrete in sea water, statistical quality
control, acceptance criteria as per BIS code.
Non-destructive testing of concrete: Surface Hardness, Ultrasonic,
Penetration resistance, Pull-out test, chemical testing for chloride
and carbonation- core cutting - measuring reinforcement cover
Special concretes - Lightweight concrete- description of various
types -High strength concrete - Self compacting concrete -Roller
compacted concrete – Ready mixed concrete – Fibre reinforced
concrete - polymer concrete
Special processes and technology for particular types of
structure - Sprayed concrete; underwater concrete, mass concrete;
slip form construction, Prefabrication technology
Pervious concrete (also called porous concrete, permeable concrete, no fines concrete and porous pavement) is a special type of concrete with a high porosity used for concrete flatwork applications that allows water from precipitation and other sources to pass directly through, thereby reducing the runoff from a site and allowing groundwater recharge. ...
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The vacuum dewatering process basically improves strength, durability, and other properties of concrete by reducing the water-cement ratio immediately after the mix is placed, usually in floors and other flatwork. A Bridgeport, Connecticut vacuum dewatering demonstration, although it involved no new ...
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Strength of concrete (for civil engineering) laxman singh
i have made all the slide for civil engineering and poly diploma civil.
these are 100% correct but in case of some error comment down or contact me on (laxmans227@gmail.com)
follow me for all updates
if u have any doubt fell free to ask on comment section
i upload new slides every sunday,
so keep calm and follow me(now).
software - power point presentation 2015
Regular inspection and documentation are major parts of management planning for culverts.
Coverage range - all types of culverts from wood, concrete, metal, plastic and composite are discussed.
Inspectors Safety:
Written safety plan:
Notification to road users:
Checklists:
Frequency:
Scheduling:
Reporting:
Protective clothing and gear:
Rivets, fasteners, and couplings:
For dam construction, two cofferdams are usually built, one upstream and one downstream of the proposed dam, after an alternative diversion tunnel or channel has been provided for the river flow to bypass the dam foundation area. These cofferdams are typically a conventional embankment dam of both earth- and rock-fill, but concrete or some sheet piling also may be used. Typically, upon completion of the dam and associated structures, the downstream coffer is removed and the upstream coffer is flooded as the diversion is closed and the reservoir begins to fill. Dependent upon the geography of a dam site, in some applications, a "U"-shaped cofferdam is used in the construction of one half of a dam. When complete, the cofferdam is removed and a similar one is created on the opposite side of the river for the construction of the dam's other half.
The cofferdam is also used on occasion in the shipbuilding and ship repair industry, when it is not practical to put a ship in drydock for repair or alteration. An example of such an application is certain ship lengthening operations. In some cases a ship is actually cut in two while still in the water, and a new section of ship is floated in to lengthen the ship. Torch cutting of the hull is done inside a cofferdam attached directly to the hull of the ship; the cofferdam is then detached before the hull sections are floated apart. The cofferdam is later replaced while the hull sections are welded together again. As expensive as this may be to accomplish, use of a drydock may be even more expensive. See also caisson.
A 100-ton open caisson that was lowered more than a mile to the sea floor in attempts to stop the flow of oil in the Deepwater Horizon oil spill has been called a cofferdam.[4] It did not work, as methane hydrates froze in the upper levels preventing the containment.
Aggregates: Review of types; sampling and testing; effects on properties of concrete, production of artificial aggregates.
Cements: Review of types of cements, chemical composition; properties and tests, chemical and physical process of hydration,Blended cements.Properties of fresh concrete - basics regarding fresh concrete –
mixing, workability, placement, consolidation, and curing,
segregation and bleeding
Chemical Admixtures: types and classification; actions and
interactions; usage; effects on properties of concrete
Mineral Admixtures: Flyash, ground granulated blast furnace slag,
metakaolin, rice-husk ash and
silica fume; chemical composition; physical characteristics; effects
on properties of concrete; advantages and disadvantages.
Proportioning of concrete mixtures: Factors considered in the design of mix . BIS Method, ACI method.,Properties of hardened concrete: Strength- compressive tensile
and flexure - Elastic properties - Modulus of elasticity - Creep-
factors affecting creep, effect of creep - shrinkage- factors affecting
shrinkage, plastic shrinkage, drying shrinkage, autogeneous
shrinkage, carbonation shrinkage ,Durability of concrete: Durability concept; factors affecting,
reinforcement corrosion; fire resistance; frost damage; sulfate
attack; alkali silica reaction; concrete in sea water, statistical quality
control, acceptance criteria as per BIS code.
Non-destructive testing of concrete: Surface Hardness, Ultrasonic,
Penetration resistance, Pull-out test, chemical testing for chloride
and carbonation- core cutting - measuring reinforcement cover
Special concretes - Lightweight concrete- description of various
types -High strength concrete - Self compacting concrete -Roller
compacted concrete – Ready mixed concrete – Fibre reinforced
concrete - polymer concrete
Special processes and technology for particular types of
structure - Sprayed concrete; underwater concrete, mass concrete;
slip form construction, Prefabrication technology
Pervious concrete (also called porous concrete, permeable concrete, no fines concrete and porous pavement) is a special type of concrete with a high porosity used for concrete flatwork applications that allows water from precipitation and other sources to pass directly through, thereby reducing the runoff from a site and allowing groundwater recharge. ...
pervious concrete cost vs concrete
pervious concrete cost
pervious concrete paving
pervious concrete driveway
pervious concrete companies
pervious concrete installation
pervious concrete patio
pervious concrete cost per yard
interesting civil engineering topics
civil engineering topics for presentation
civil seminar topics ppt
civil engineering seminar topics 2018
best seminar topics for civil engineering
seminar topics pdf
seminar topics for mechanical engineers
seminar topic for civil engineering pdf
The vacuum dewatering process basically improves strength, durability, and other properties of concrete by reducing the water-cement ratio immediately after the mix is placed, usually in floors and other flatwork. A Bridgeport, Connecticut vacuum dewatering demonstration, although it involved no new ...
vacuum dewatering system
vacuum dewatering pump
vacuum dewatering box
wellpoint pump systems
dewatering pump system
dewatering pump
dewatering wellpoint
small wellpoint dewatering systems
interesting civil engineering topics
civil engineering topics for presentation
civil seminar topics ppt
civil engineering seminar topics 2018
best seminar topics for civil engineering
seminar topics pdf
seminar topics for mechanical engineers
seminar topic for civil engineering pdf
Strength of concrete (for civil engineering) laxman singh
i have made all the slide for civil engineering and poly diploma civil.
these are 100% correct but in case of some error comment down or contact me on (laxmans227@gmail.com)
follow me for all updates
if u have any doubt fell free to ask on comment section
i upload new slides every sunday,
so keep calm and follow me(now).
software - power point presentation 2015
Regular inspection and documentation are major parts of management planning for culverts.
Coverage range - all types of culverts from wood, concrete, metal, plastic and composite are discussed.
Inspectors Safety:
Written safety plan:
Notification to road users:
Checklists:
Frequency:
Scheduling:
Reporting:
Protective clothing and gear:
Rivets, fasteners, and couplings:
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24. Optimum VViibbrraattiioonn TTiimmee
Optimum Time is
directly proportional to
Size of Vibrator
Type of concrete
Size of concrete or
Timings of Vibrations in Seconds
member
Type of vibrations i.e.
frequency, amplitude &
acceleration
Optimum Time
29. IInntteerrnnaall VViibbrraattoorrss
Most Common
Vibrations upto 12000 cps
Dia of poker 20 to 175 mm
Length of poker – 25 to 90 mm
Needle can be replaced by flat needle
(blade) to compact congested areas
Portable
35. Execution ooff VViibbrraattiioonnss
CCOORRRREECCTT
Vertical penetration a few inches
into previous lift (which should not
yet be rigid) of systematic regular
intervals will give adequate
consolidation
IINNCCOORRRREECCTT
Haphazard random penetration of
the vibrator at all angles and
spacings without sufficient depth will
not assure intimate combination of
the two layers
Fig. Top : Honeycomb and rock pockets are the results of inadequate consolidation.
Fig Bottom: Sand streaks
Unit wt can also be measured by density gauges to assess sufficiency of compaction
Fig. 11-11. Internal vibrators are commonly used to consolidate concrete in walls, columns, beams, and slabs. (69970)
Schematic: Radius of action ( R) of a vibrator is about three to five times the vibrator diameter (d). A Vibrator should be inserted about 1 ½ times the radius of action to consolidate concrete properly. The operator will be able to see the radius of action in the concrete.
Table 11-1. Range of Characteristics, Performance, and Applications of Internal Vibrators.
Generally, extremely dry or very stiff concrete does not respond well to internal vibrators.
While vibrator is operating in concrete.
Distance over which concrete is fully consolidated.
Assumes the insertion spacing is 11¼2 times the radius of action, and that vibrator operates two-thirds of time concrete is being placed. These ranges reflect not only the capability of the vibrator but also differences in workability of the mix, degree of deaeration desired, and other conditions experienced in construction.
129-18
1. Suitable for thin columns and Thin walls
Method suitable where rft, lateral ties and spacers interfere with operation of internal vibrators.
Impulses are mostly perpendicular to the form.
Requirement of good formwork.
1. Another type of external form vibrators.
2. Vibrator clamped on the surface of the table of table mounted on springs.
3. Generally used in labs for casting cubes etc and for preparing precision pre cast elements.
4. Frequency < 6000 vib per min
5. Amplitude 0.12 mm
Clamped on Screed Boards – Single or Double Boards