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[fugeeo]

Question regarding maximum concrete strength f'c using standard materials.

I am familiar that ACI 318 code is written primarily for 6000 psi concrete
and below.  And that any concrete strengths above 6000 psi need to be
considered in a high strength concrete code when performing design
calculations.

I am wondering, if anyone knows the highest strength of concrete that could
be reasonably achieved with standard materials, not including pozzolans.
Standard materials I refer to are superplasticizer, cement, aggregate and
water, assuming the aggregate is fairly good, perhaps of Tarris material.

Refugio

Posted via Email

[rajmane]

17-11-2006
Dear all

(1) The opinion of Refugio is that ACI 318 code is for concrete with strength < 6000 psi
and Concrete strength >6000 psi is taken as high strength concrete code for design
calculations. But there are many more definitions of high, normal, etc categories of concrete.

(2) The highest strength of concrete that could be reasonably achieved with standard materials (superplasticizer, cement, aggregate can be as much as 130 MPa or even more; for this, it is necessary to have suitable selections of :type and properties of cement, w/c ratio, type and dosage of superplasticizer, mixing and curing, etc.

Thanking you all, with regards

N P Rajamane  Deputy Director and Head, Concrete Composites Lab,  Structural
Engg Research Centre, CSIR, Taramani, Chennai 600113  (Ph : 22549152 (D),
22549150 (CCLab), Res: 224417882)  Email : rajmane[AT]ser..., rajamanenp[AT]yah...

PS : The above opinion is personal and it may not be necessarily the view
of SERC.

fugeeo[AT]gma... wrote: