Portland cement type1-425

Portland cement type1-425

This national iran standard cement in accordance with number 389 ISIRI, that has the chemical and physical properties of cement 325-1 is. The initial pressure resistance but have (2-day) at least 100 kg cm² and the final resistance (28-day) at least 425 kg cm² and maximum of 625 kg on square centimeter that the early closure of a hard cement and concrete structures in all armed and unarmed that need to be more original and final strength, the ability to apply. In typical بتنهای as expressed in lieu of cement 325-1, all of the columns, the slab roofs, bridges, structures that need to open a quick format and concreting in cold weather, the application of the cement is.

 

Note: due to the hardening of faster, better in that the risk of increased concrete temperature tropic areas to more than 32 degrees Celsius and heavy concrete placement in the world over 15 ° c, there are 425 cement consumption-1 carried out with caution.

 

Physical and chemical properties of Portland cement type 1-425

 

Type 1-425

Standard Requirement

Result

Physical Specification

Standard Requirement

Result

Chemical Specification

Min:2800

3200±100

Blaine(/g)

 

20.7±0.3

SiO2%

Max:0.8

0.08±0.02

Auto Clave Method %

 

5.2±0.2

Al2O3%

Min:45

140±20

Setting Time In (minute)

 

4.6±0.2

%Fe2O3

Max:360

240±20

Setting Time Fi (minute)

 

65±0.5

%CaO

Min:100

210±10

Comp.Strength kg/ (2day)

Max:5

1.8±0.2

%MgO

 

440±10

Comp.Strength kg/ (7day)

Max:3

2.2±0.4

%SO3

Min:425

530±10

Comp.Strengthkg/(28day)

 

0.5±0.06

%K2O

 

1.2±0.1

Sieve 0.09 mm

 

0.15±0.05

%Na2O

 

3.13±0.01

Density g/

Max:3

1±0.5

%L.O.I

(LossOf Ignition)

 

Max:0.75

0.5±0.1

% I.R

(Insoluble Residue)

 

1.3±0.2

%FreeCaO

 

59.47

C3S%

 

14.48

C2S%

 

6.00

%C3A

 

14.00

C4AF%