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Concrete mix - Concrete Engineering general discussion ...

31/01/2010  Concrete Engineering general discussion Forum; Concrete mix. 2. thread592-257199. Forum: Search: FAQs: Links: MVPs: Menu Concrete mix Concrete mix WHH47 (Specifier/Regulator) (OP) 21 Oct 09 22:08. I am doing estimating for projects in rural foreign countries where, read-mixed concrete is not available, and they have to either hand mix or use portal concrete mixer. Can anyone tell me how to mix ...

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Concrete mix problem - Concrete Engineering general ...

09/07/2012  Concrete Engineering general discussion Forum; Concrete mix problem. thread592-325263. Forum: Search: FAQs: Links: MVPs : Menu. Concrete mix problem Concrete mix problem karma134 (Civil/Environmental) (OP) 5 Jul 12 08:29. Dear fellow engineers I have been having problems in my concrete for the couple of weeks in every grade of concrete. Generally we keep the

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Concrete oz/cwt - Concrete Engineering general discussion ...

26/06/2019  For a common 3000 psi mix having a cement content of around 500 lbs, you would have 7x500/100 or 35 ounces of admixture. If your 54 ounces is the total amount of the dosing, then you would have a cement content of about 770 lbs/cubic yard. A Great Place For Engineers to Help Engineers

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Concrete Mix Design - Concrete Engineering general ...

09/04/2016  Concrete Mix Design. Concrete Mix Design. drago8 (Civil/Environmental) (OP) 9 Apr 16 01:14. Dear All, I have an enquiry regarding concrete mix design. Usually how do you guys review the submitted concrete mix design by the Contractor?

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Concrete Mix Ratio and How to Mix Concrete Including a ...

Testing a Concrete Mix. To test a concrete mix a 300mm high cone made of steel is used that features a top opening of 100mm diameter and a bottom opening of 200mm diameter. The mixed concrete is placed into the cone through the top, a bar is used to compact the concrete and remove any air voids within the cone. The cone is then lifted clear.

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Concrete mix problem - Concrete Engineering general ...

09/07/2012  Concrete Engineering general discussion Forum; Concrete mix problem. thread592-325263. Forum: Search: FAQs: Links: MVPs : Menu. Concrete mix problem Concrete mix problem karma134 (Civil/Environmental) (OP) 5 Jul 12 08:29. Dear fellow engineers I have been having problems in my concrete for the couple of weeks in every grade of concrete. Generally we keep the

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Concrete oz/cwt - Concrete Engineering general discussion ...

26/06/2019  Concrete Engineering general discussion Forum; Concrete oz/cwt. 2. thread592-455127. Forum: Search: FAQs: Links: MVPs: Menu. Concrete oz/cwt Concrete oz/cwt bbadlose (Civil/Environmental) (OP) 26 Jun 19 04:45. Hello all , Can someone please explain oz/cwt and how that calcs out to total ounces of admixture per yard ? I have a mix that is approximately 7oz/cwt and 54 oz

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CONCRETE BASICS A Guide to Concrete Practice

CHAPTER 5 Proportioning and Mixing Concrete pages 15–16 CHAPTER 6 Planning and Site Preparation pages 17–19 CHAPTER 7 Transporting and Placing Concrete pages 20–22 CHAPTER 8 Compacting Concrete pages 23–25 CHAPTER 9 Finishing Concrete pages 26–27 CHAPTER 10 Curing Concrete pages 28–30 CHAPTER 11 Joints in Concrete pages 31–33 CHAPTER 12 Hot and Cold

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Questionable Concrete Strength - Concrete Engineering ...

Concrete Engineering general discussion Forum; Questionable Concrete Strength. 2. thread592-391815. Forum: Search: FAQs: Links: MVPs: Menu. Questionable Concrete Strength Questionable Concrete Strength msquared48 (Structural) (OP) 23 Jul 15 19:59. Has anyone ever heard or seen the strength of a concrete pour going from 1450 psi at 28 days to over 4000 psi at one year? Seems like

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Mix Design Of Concrete Concrete Mix Design M 25 Mix ...

14/01/2019  Concrete Trial Mix 2. To increase the workability of concrete mix from 25 mm to 50-75 mm an increase in water content by +3% is to be made. The corrected water content for mix = 191.6 x 1.03 = 197.4 kg. As mentioned earlier to adjust fresh concrete properties the water cement ratio should not be changed. Hence; Cement Content = (197.4/0.5 ...

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Biological Concrete - Concrete Engineering general ...

The concrete mix apparently uses a low ph (around 8) which is slightly acidic...thus potential for rusting in any attached or embedded ferrous material. They also use a three layer system (structural concrete, then a membrane, then the "biological concrete" that absorbs and traps water for the little groweys.

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Concrete without Sand??? - Concrete Engineering general ...

Concrete Engineering general discussion Forum; Concrete without Sand??? thread592-389857. Forum: Search: FAQs: Links: MVPs: Menu. Concrete without Sand??? Concrete without Sand??? miningman (Mining) (OP) 22 Jun 15 13:12. Has anyone ever produced adequate concrete without the use of sand?? Not so hypothetically, assume local sources of sand are unavailable for environmental

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Recommended Concrete Mixes for Various Types of Construction

Table: Recommended mixes for Different Concrete Construction. Type of work. Concrete Mix Ratio. Max. size of aggregates (mm) Water for dry aggregates (liter)*. Water for aggregates condition from dry to moist batch (liter)*. Water for best consistency (liter)*. Small precast work, fence posts, poles, garden furniture and other work of very thin ...

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23 Types of Concrete Used in Construction and their ...

The concrete that mix and bathed in a central mixing plant is called as ready-mix concrete. The mixed concrete is brought to the site with the help of a truck-mounted transit mixer. This once reached in the site can be used directly without any further treatment. The ready-mix concrete is very precise and specialty concrete can be developed based on the specification with utmost quality. The ...

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Surface irregularities in concrete wall - Concrete ...

Concrete Engineering general discussion Forum; Surface irregularities in concrete wall. 5. thread592-432024. Forum: Search: FAQs: Links: MVPs: Menu. Surface irregularities in concrete wall Surface irregularities in concrete wall concreteworld (Civil/Environmental) (OP) 7 Nov 17 18:31. Hello All, We are troubled with change in color of concrete in METRO tunnel wall. The wall is 30 m long and ...

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Recommended Concrete Mixes for Various Types of Construction

Table: Recommended mixes for Different Concrete Construction. Type of work. Concrete Mix Ratio. Max. size of aggregates (mm) Water for dry aggregates (liter)*. Water for aggregates condition from dry to moist batch (liter)*. Water for best consistency (liter)*. Small precast work, fence posts, poles, garden furniture and other work of very thin ...

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Mix Design Of Concrete Concrete Mix Design M 25 Mix ...

14/01/2019  Concrete Trial Mix 2. To increase the workability of concrete mix from 25 mm to 50-75 mm an increase in water content by +3% is to be made. The corrected water content for mix = 191.6 x 1.03 = 197.4 kg. As mentioned earlier to adjust fresh concrete properties the water cement ratio should not be changed. Hence; Cement Content = (197.4/0.5 ...

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Concrete Mix Design Calculation - M20, M25, M30 ...

Concrete Mix Design Data Required for Concrete Mix Design (i) Concrete Mix Design Stipulation (a) Characteristic compressive strength required in the field at 28 days grade designation — M 25 (b) Nominal maximum size of aggregate — 20 mm (c) Shape of CA — Angular (d) Degree of workability required at site — 50-75 mm (slump) (e) Degree of quality control available at site — As per IS ...

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Guidelines for Concrete Mix Designs

Concrete mix designs are submitted for review so that the reviewer can verify the contractor is interpreting the construction documents correctly. These guidelines were developed to assist the engineer reviewing concrete mix designs. The main body of the guidelines focuses on the process of reviewing the mix design. The appendices provide a discussion of performance issues and code ...

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Concrete Mix Design Using DoE Method - UKEssays

1. Introduction 1.1. In this report I will calculate the exact amount of materials required to produce 1m 3 of concrete, designed to the Department of Environment (DoE) method. This method of concrete design was first introduced in 1950, under the name “Road Note No 4”, which was later replaced by “Design of Normal Concrete Mixes” in 1975 by the British Department of Environment (DoE).

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LAB DESIGN MIX CONCRETE - DISCUSSION - DISCUSSION

View LAB DESIGN MIX CONCRETE - DISCUSSION.docx from MECHANICAL 491 at Universiti Teknologi Mara. DISCUSSION Material used in reinforced concrete structures are subjected to preliminary material tests

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Concrete Mix Design Report - SlideShare

02/10/2015  Range of normal weight concrete is from 2,200 kg/m3 to 2,400 kg/m3 10. Always take 3 samples for each test. 11.Calculate the average of all 3 samples for accuracy. 12.Complete all the required necessary tests before you start Concrete Mix Design calculations and make a table of their resulted values. 10.

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23 Types of Concrete Used in Construction and their ...

The concrete that mix and bathed in a central mixing plant is called as ready-mix concrete. The mixed concrete is brought to the site with the help of a truck-mounted transit mixer. This once reached in the site can be used directly without any further treatment. The ready-mix concrete is very precise and specialty concrete can be developed based on the specification with utmost quality. The ...

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Concrete Durability - an overview ScienceDirect Topics

In practice, a wear-resistant concrete is probably most reliably achieved by the combined use of a high-strength grade concrete mix and an aggregate exhibiting the appropriate grading and mechanical properties. 193 In certain cases, such as some concrete road pavements, the abrasion and polished stone values (section 16.5.8) of the coarse aggregates might be considered to be important parameters.

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(PDF) Concrete Laboratory Report - ResearchGate

30/09/2013  It contains trial mix designs (mix requirements and mix proportions) and experimental results (compressive strength, shrinkage and heat of hydration) of two concrete mixes to be used for two ...

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