Answer / g himanth kumar

For the concrete with different grades the strength development for 7days is approximately 60 to 70% of its 28days characteristic strength.

Answer / imran

Ok fine let me start with 7 days strength, the provision of 7 Days Strength is now ended over Globally, else in previous version of IS was two third of the characteristics strength and 100% of characteristic strength after 14 days.
There Fore the Deflected Strength for M-25 in:
7 Days 16.67 N/mm2.
14 Days 25.00 N/mm2
28 Days 28.00 N/mm2 (As per Latest Revision of IS 456 Fck + 3)

Answer / santo.m.f

M25 test result at 7 days is of its 65%. ie; M25:-16.25 N/mm2. then 14 days 90%. ie; M25:- 22.5 n/mm2 .

U are a civil engineering student?why do u want to enter into IT industry

14 Answers   TCS,

---

M30 Grade Concrete unit weight

3 Answers  

---

what is PEB structure

1 Answers   Adarsh Group,

---

Can we weld hot rolled steel ASTM A615 ?

2 Answers  

---

strength of bitumen concrete with 80-100 & 60-70 grade bitumen

0 Answers  

---

---

Why do we use badarpur or crusher sand with coarse aggregate in a concrete mix?

1 Answers  

---

What is the acceptance criteria to determine the "Core density" of "DBM or BC" course,for any grade as per "MORTH" guidelines in road construction work ?

2 Answers   DBM, NCC,

---

how much sand requires for Light weight blocks for 100sqft

1 Answers   Bahria Town, NCC,

---

what is the full form of following sueface type of road - AC,CC,(PM,DM,SB),(CG,Ma,Me), G,E,O

2 Answers  

---

how to calculate result on Plate bearing test?

1 Answers  

---

How to evaluate the elastic modulus of soil from the plate load test result? for example ..one of test results are here Max. settement =4.56mm(at 900kPa) Residual settlement = 4.02mm Maximum pressure on soil 900kpa Soil bearing capacity 300kpa Plate diameter=300mm Thickness =25mm Soil description =Grey, clayey silty SAND with gravels and rock fragments

1 Answers  

---

hi i am working in a civil Lab .....they asked me to find out the compressive strength of concrete cubes after 7 days of curing....the value of load on CCT machine is 205KN how to convert it to Kg/cm2 ....plzz help me...........

6 Answers  

---