Portland cement type1-525

Portland cement type1-525

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.

The cement for the construction of the concrete structures that need to render and format is a quick, concrete and application in addition to the capability of taking on the ordinary concrete placement, special application for the typical bulky concrete in cold weather and that the need to maintain the temperature of concrete more than 5 degrees Celsius, is.

Note:due to therapidhardening,cementproduced bythisheatmoreHydra-soforbulkyconcrete placementin summer andwarm airisnot recommendedforordinaryconcreteinhotweatheris alsoin compliance withthe maximumtemperature of theconcreteup to23° cis bestconsumedwith caution.
 
Physical and chemical properties of Portland cement type 1-525
 

Type 1-525

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:200

230±10

Comp.Strengthkg/(2day)

Max:5

1.8±0.2

%MgO

 

440±10

Comp. Strength kg/(7 day)

Max:3

2.2±0.4

%SO3

Min:525

550±10

Comp. Strengthkg/(28 day)

 

0.5±0.06

%K2O

 

1.1±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

0.4±0.1

% I.R

(Insoluble Residue)

 

1.3±0.2

%FreeCaO

 

59.47

C3S%

 

14.48

C2S%

 

6.00

%C3A

 

14.00

C4AF%