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Showing posts with label concrete curing. Show all posts
Showing posts with label concrete curing. Show all posts

Monday, December 17, 2018

Some useful guidelines for the calculation of concrete costs

Besides, considering the price of concrete per yard (or meter), cost calculation of new concrete includes other items like surface prep, formwork, reinforcing materials, and finish work, as well as the cost of the ready-mix concrete, that will be included to the total price of the concrete work. The Costs for specific items differ location wise or from site to site, but an approximate estimate can be prepared with some average amounts.

Cost Per Yard of Ready-Mix Concrete

The most vital item refers to the price of concrete, whether ready-mix concrete or other concrete material are utilized. Local ready-mix concrete suppliers can provide you the quotes based on the project specifications and the job location. Concrete pricing is generally stated per cubic yard or cubic meter (metre). For an average estimating purpose, utilize $77 per cubic yard.

Cost of Concrete Sub-Grade Work

When the concrete is set over soil, it is required to grade or make the surface ready for the concrete. Pricing for this includes the expenses associated with grading, compacting soil, excavating, trenching, and other components. As a good average, it is recommended to utilize $65 per hour of work required to set up the surface, supposing that the surface is leveled over 75 percent and no special work is necessary to make the site ready.

Costs for Extra Sub-Grade or Site Work

If the surface is unleveled, it is required to incur expenses for additional site work like excavating and filling with proper material or eliminating a soft spot on the terrain to prepare it for resisting structural loads. Based on the distance from where the sand will be arranged or any other proper fill material, it could put in over $10 per cubic yard or meter to your estimate. Another cost may incur for polyurethane plastic or vapor barrier essential to be set up prior to concrete placement.

Cost of Concrete Formwork

Developing concrete forms generally indicate a vital part of the total cost of concrete work, since it is one of the most time-consuming tasks of the job. It is required to recognize the type of formwork to be utilized as well as how it will be set up, and whether the form materials will be purchased or rented. Other related costs may contain a crane or other equipments which are applied to shift the form materials, form release product, re-processing form materials, and the cost to repair forms after various applications.

On average, formwork costs at $1.10 per square foot of the concrete area. It is calculated for a square or rectangular area. The cost is increased for concrete, if the formwork is rounded or contoured.

Cost to Finish Concrete

Concrete prices change considerably based on the type of finishing stated in the design. Concrete is finished several ways like smooth surface, exposed aggregate surface, or stamped concrete finish. Some surfaces may need only a strike-off and screed to perfect contour and elevation, whereas for others surfaces, a broomed, floated, or troweled finish should be specified. To calculate the finishing in your concrete pricing analysis, add $0.75 per square foot or perhaps more, based on the intricacy of the specified finish. The cost of any curing compound or testing services required should also be considered.

Cost of Concrete Reinforcement

Most concrete comprises of some type of reinforcement, like rebar, wire mesh, plastic mesh, or fiber which are included to the concrete mix to make the strength and crack-resistance better. Standard reinforcing materials can include roughly $0.18 cents per square foot. This number is greater for large-diameter rebar or other special reinforcement.

Some useful guidelines for the calculation of concrete costs

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Published By
Rajib Dey
www.constructioncost.co
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Saturday, June 16, 2018

Some vital methods for concrete curing

METHODS OF CURING :- Based on the type of construction work, the curing of concrete is done with the use of the following processes :-
1) COVERING: Under this method, wet gunny bags or hessian are utilized to wrap the newly developed concrete surface. This process is very effective for horizontal and vertical surface.
2) PONDING: Under this process, the entire surface is segregated into rectangular or square cages with the development of tiny clay bunds and these cages are filled with water occasionally building small ponds. This process is ideal for curing horizontal surfaces like floor, pavements etc.
3) SUBMERGING IN WATER: Pre-cast concrete members are over and over again cured by submerging them under water.
4) STEAM CURING: With this process, steam under pressure is sprinkled over the concrete surface. This process is very useful for pre-cast members.
5) SPRINKLING: Under this process, the water is sprinkled repeatedly over the concrete surface to keep the surface wet.
6) CURING WITH CHEMICAL: Under this process, water is sprayed over the surface as soon as specific amount of hygroscopic salt like NaCI, CaCletc are added. It helps to engross moisture from the atmosphere.
(7) MEMBRANE CURING: Under this process, concrete surface is wrapped with water proof membrane like wax emulsion, bitumen emulsion etc. The membrane stops the vaporization of water from concrete surface.
Article Sourcewww.civilnoteppt.com
Some vital methods for concrete curing


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Published By
Rajib Dey
www.constructioncost.co
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Thursday, February 20, 2014

ICF Concrete Additives, LLC introduces HiperLon™ to substitute steel rebar in concrete application

ICF Concrete Additives, LLC launched the latest fiber, HiperLon™ which can make a sea change in the way concrete is set in all applications. HiperLon™ refers to a three-inch fiber that blends so well that it can even be shot-creted. HiperLonTM can minimize as well as substitute steel rebar in precast, cast-in-place, underground, and shotcrete applications.
 Now the construction professionals can get rid of the issues like corrosion and failure in the concrete. Besides, the construction professionals can create their bid based on a fixed cost as there will be no cost fluctuation due to elimination of rebar for scheduling and estimating. HiperLon™ is supported with technical data to ensure that it will substitute rebar in precast and slab applications. It is now applied to complete rebar substitution in one- and two-story residences also.
Use of rebar is dangerous that can often lead to job threatening injuries. So the usage of HiperLon™ is increasing at a rapid due to safety issue.
 Several Texas based petrochemical companies on the Gulf Coast and municipalities now utilize HiperLon™ to reinstate their rebar in culverts and other flat work.
HiperLon™ treated concrete is verified under contract by multiple Military agencies; supplementary testing concerning impact and cracking under heavy loads, has exposed the finished concrete to include impressive properties. For getting more updates on HiperLon™ fiber, visit www.icfconcreteadditives.com.

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Published By
Tuhin Maity
www.quantity-takeoff.com
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