Good concrete can be obtained by using a wide variety of mix proportions if proper mix design procedures are used. I want to which admixture will develop good properties in concrete. I am looking for mix design M50 as per IS codes.
Respected Alex Mrema sir,
Thank for your information.
In order to obtain high strength concrete, it is suggested to reduce water-cement ratio to less than 0.4. However, by reducing water-cement ratio alone it may affect the workability of the concrete mix. In order to overcome the workability problem you may use high water reducer superplasticzer like Glenium Ace produced by BASF company if available at your place.
Respected mohd zulham affandi mohd zahid sir,
Thank for your information. I will find this material . Actually i am not sure its available or not.
you can use product of degaset pc 8200 to reduce water/cement ratio and increase workability, the recommended amount to use in concrete mix is 0.4% - 2.0% of total binder. I used mix proportions by weight according to cement weight; 1 cement : 1.81 sand: 2.75 gravel : 0.75% Pc 8200 : 0.325 water and the compressive strength of concrete cubes were 75 Mpa and the slump 210 mm.
you can use mineral admixture like micro,nano silica and nano fly ash,RHA,GGBS etc.. with addition of HRWA
Respected Fareed H AlMosawi sir,
Thank for your information.
Respected Magudeaswaran P sir,
Thank for your information.
first of all, all the above recommendation is good.
i suggest that, reduce the NMAS (Nominal max aggregate size) (may be 19 mm is good depend on the specimens dimensions)
and reduce the W/c Ratio to less than 0.40 using type F
finally may be silica fume additives will be good
with my regards
To increase the strength of your concrete, you must add supplementary cementitious materials such as silica fume, slag, fly ash (15 to 25% of cement weight) and poly carboxylate based superplasticizer (1.2 to 1.6 % of cementitious materials). These superplasticizers not only increase the workability but also be the cause for strength induction.
Respected Abdellatif Elsayed sir,
Thank for your information.
Respected Hafiz Asad Ali sir,
Thank for your information. in addition to that cement is combination of SiO2 content, Al2O3 content, Fe2O3 content, CaO content , MgO content , SO3 content . why we need to add again supplementary cementitious materials? if we add supplementary materials the strength of concrete may be loose.
I have recently presented a paper in South Africa on "Achieving high strength/high performance concrete from coral-limestone aggregates using Ordinary Portland cement, fly ash and superplasticizer" in which I achieved 50 MPa concrete after 56 days of curing. The superplasticizer used was "Mega -Flow SP 102". You are welcome to read the full length paper which is presented here in Researchgate under my name.
Respected Fasil MOHI UD DIN Masoodi sir,
Thank for your information.
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