Jiang Su Seminar 2014

In the spring of 2014,SHIFENG GROUP organized a seminar in JiangSu province,China.As usual,we invited local customers to attend.

Our professional engineers introduced the feature of our block machine,mold,splitting machine,shot blasting machine,palletizer,etc.At the same time, he also explained the strength knowledge of different blocks and bricks (the key points are listed below), and the customers listened with interest.The seminar ended in a happy atmosphere.

Standard Strength Grade of Concrete Wall Block

MU30、MU25、MU20、MU15、MU10、MU7.5

Notes:

MU=Masonry Unit

p=F/S(p=ρgh for liquid)

1KPa=1KN/㎡,1MPa=106Pa≈145psi≈10.2kgf/cm²

1kgf/cm²=98.067kPa≈98kPa

1psi（1bf/in²）=6.8948kPa≈6.9kPa

1mmH2O=9.8067Pa≈9.8Pa

MU10 means that the average compressive strength of block is not less than 10MPa

For concrete paver brick,in China,it shall be in accordance with the following table about Compressive Strength and Flexural Strength/Bending Strength.

Compressive Strength(Mpa)			Flexural Strength/Bending Strength(Mpa)
Grade	Average Value	Single Minimum	Grade	Average Value	Single Minimum
C40	≧40.0	≧35.0	C4.0	≧4.00	≧3.20
C50	≧50.0	≧42.0	C5.0	≧5.00	≧4.20
C60	≧60.0	≧50.0	C6.0	≧6.00	≧5.00

Notes:

C=Concrete

C30 means concrete with strength grade of 30MPa.

Compressive Strength (σ BC) refers to the strength limit when external force is applied.

p=P/A

p is the compressive strength, in PSI per square inch, in kilograms per square centimeter, P is the pressure, in pounds and kilograms, A is the section area, in centimeters per square inch.

Flexural strength refers to the ultimate breaking stress of a material under bending moment per unit area. Also known as bending strength, modulus of rupture.

fcf = 1.5FL / (bhh)

f -- flexural strength (Mpa);

F -- failure load under bending resistance (n);

L -- distance between two fulcrums (mm);

b -- section width of test piece (mm);

h -- section height of test piece (mm);