How to prepare the ratio of C25 concrete bending resistance 4 0

Mix ratio of C25 concrete:

Water: 195kg;

Cement: 443kg;

Sand: 561kg;

Stones: 1181kg;

The mix ratio is::1::.

The strength grade of concrete refers to the compressive strength of the concrete. The strength grade of concrete should be divided by the standard value of the compressive strength of the concrete cube. The symbol c is used with the standard value of the compressive strength of the cube (in n mm 2; or MPA).

Ordinary concrete is divided into fourteen grades, namely: C15, C20, C25, C30, C35, C40, C45, C50, C55, C60, C65, C70, C75, C80.

The amount of C25 cement does not need so much to achieve bending resistance, and this ratio is very good: cement, water, sand, gravel (size 7:3) 340, 153, 608, 1353;The sand rate is controlled at 31, and the water-cement ratio is controlled.

The bending requirements of C25 concrete itself are, so the cement, sand and stone are sent to the experimental testing unit for testing, and the prepared C25 concrete mix ratio can meet the bending requirements.

To improve the particle size of the concrete stone, it is best to be a coarse aggregate composed of 40mm single particle size and continuous particles. Among them, 40mm stones should account for more than 50%, which plays a role in increasing workability and filling gaps. The sand rate is reduced, and the coarse aggregate is 1100-1300.

Choose a smaller slump. The increase of coarse aggregate and the increase of particle size will improve the flexural strength of concrete. We generally use C30 for the bending resistance of the road surface.

The normal mix ratio is also about the same.

The flexural strength of concrete is C25 grade concrete.

Calculation formula. Flexural strength FCF = FL (BHH).

Test f--flexural strength (MPa);

f-- Failure load when subjected to flexural resistance (n);

l--The distance between two fulcrums (mm);

b--Specimen cross-sectional width (mm);

h--Specimen cross-sectional height (mm);

Only when the cross-section occurs between two loading points can the flexural strength be calculated, otherwise the result of the specimen is invalid.

Summary. Flexural concrete + mix ratio design.

Hello dear, C25 concrete mix ratio (1) C25 concrete mix ratio 1 A, cement: water: sand:

Gravel = 372:175:593:

1260=;b. The dosage of test mixing materials is: cement: water:

Sand: Crushed stone = bending concrete + mix ratio design.

Bending concrete + mix ratio design Hello pro, C25 concrete mix ratio (1) C25 concrete stool concrete mix ratio 1 A, cement: water resistance: sand:

Gravel = 372:175:593:

1260=;b. The dosage of test mixing materials is: cement: water:

Sand: gravel = hope can sail acres to help you.

Instructions for calculating the mix ratio of flexural concrete.

Calculation of anti-bending mixed bright imitation beam condensation and soil mix ratio shows that hello dear, cement = 436 sand is known 436, gravel = 258 *, water = 258 *, admixture = 258 * 5% =. The water content of the sand is 3% * 436 = 13, I hope the big bucket can help you.

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What is the C25 concrete flexural strength grade? Yes or something else:, it's hard to achieve.

According to the compressive strength, every 5MPa grade corresponds to the flexural strength grade of exchange. That is: ;;

The pavement concrete strength grade is C25, and the flexural resistance can reach megapascals.

Summary. Hello dear! The mix ratio of C25 impermeable concrete is: cement (sand, gravel, water, admixture (carboxylic acid), expansion agent are 175, 25.

Hello dear! The mix ratio of C25 impermeable concrete mold is as follows: cement (sand, stone, water, admixture (carboxylic acid ear), expansion agent are 175 and 25 respectively.

The so-called concrete construction mix ratio refers to the mix ratio used in the construction process of concrete. Adjustment steps: set the laboratory mix ratio for cement:

Sand:gravel=1:x:

y, the moisture content of the sand on site is m, and the moisture content of the stone is n, then the construction mix ratio is adjusted as: 1:x (1-m):

y/（1-n）。The design of concrete mix ratio is a very important work in the concrete engineering of the concrete sensitive brigade, which directly affects the smooth construction of the concrete of the concrete bridge stool, the quality of the concrete project and the cost of the concrete sail soil project.

The design process of concrete mix is generally divided into four stages, namely, the calculation of the preliminary mix ratio, the determination of the benchmark mix ratio, the determination of the experimental mix ratio and the determination of the balance slag of the construction mix ratio. Through this series of infiltration group work, the optimal mix ratio of each component of the concrete is selected.

Cement, sand, gravel, (1-2), gravel, (1-3), water, admixtures, fly ash.

kg/m3 327 776 782 335 180

Ratio 1: Bulk density.

The ratio is made after all the raw materials have been retested. For example, the moisture content in the sand is different, and the water that needs to be added during preparation is also different.

c25p6

Cement (sand, gravel (5-25mm pebble, continuous gradation), water, admixtures (carboxylic acids), expansion agents.

Unit: kg

Summary. 1. C25 concrete mix ratio.

a) C25 concrete mix ratio 1

a. Cement: water: sand: gravel = 372:175:59b, the dosage of test mix material is: cement: water: sand: gravel =

；c. After mixing, the slump is 30mm, which meets the design requirements.

Beg. 2) C25 concrete mix ratio 2

a. Cement: water: sand: gravel = 417:175:57b, the dosage of test mix material is: cement: water: sand: gravel =

c. After mixing, the slump is only 20mm, which cannot reach the design.

requirements, so keep the water-cement ratio unchanged and increase the amount of cement by 50

0g, add d, add 210g of mixing water, and then mix, collapse.

The drop reaches 35mm, which meets the design requirements;

C25 impermeable concrete mix ratio?

1. C25 concrete mix ratio.

a) C25 concrete mix ratio 1

a. Cement: water: sand: gravel = 372:175:59b, the dosage of test mix material is: cement: water: sand: gravel =

；c. After mixing, the slump is 30mm, which meets the design requirements.

Beg. 2) C25 concrete mix ratio 2

a. Cement: water: sand: gravel = 417:175:57b, the dosage of test mix material is: cement: water: sand: gravel =

c. After mixing, the slump is only 20mm, which cannot reach the design.

requirements, so keep the water-cement ratio unchanged and increase the amount of cement by 50

0g, add d, add 210g of mixing water, and then mix, collapse.

The drop reaches 35mm, which meets the design requirements;