rpose of adding alcohol in test method C173?

In order to evaluate the suitability of nonpotable water available at the job site for mixing concrete, six standard mortar cubes were made using that water and six others using potable water. The cubes were tested for compressive strength after 7 days of curing and produced the loads to failure (in kN) shown in Table P6.21. a. Based on these results only, would you accept that water for mixing concrete according to ASTM C94? b. According to ASTM C94, are there other tests to be performed to evaluate the suitability of that water? Discuss briefly. TABLE P6.21 Cubes Made with Cubes Made with Potable Water Nonpotable Water 64.6 73.5 70.4 74.8 63.0 79.7 71.6 69.8 70.6 83.7 64.0 74.4

Hand written solution is not allowed bro.

6.32 The results of an experiment to evaluate the effects of a water reducer are shown in Table P6.32. a. Calculate the water-cement ratio in each of the three cases. b. Using water reducer, how can we increase the compressive strength of concrete without changing workability? Refer to the appropriate case in the table. Chapter 6 Portland Cement, Mixing Water, and Admixtures c. Using water reducer, how can we improve workability without changing the compressive strength? Refer to the appropriate case in the table. d. Using water reducer, how can we reduce cost without changing workability or strength? (Assume that the cost of the small amount of water reducer added is less than the cost of cement.) Refer to the appropriate case in the table. e. Summarize all possible effects of water reducers on concrete. TABLE P6.32 Without Water Reducer With Water Reducer 735 368 2 4,100 Case 1 Case 2 Cement content, lb/yd³ Water content,* lb/yd³ Slump, inches 28-Day compressive strength, psi *Assume…

Answer carefully the following questions : 1 Die is great Se me Meaning of normal con 3-what is the range of values of standard 4-How the consistency of cement paste is measured? 5-State the significance of initial setting time and final setting time of cement. 6-What is the range value of compressive strength for normal concrete 7 days and 28 days? ODOO TOSTSEC of C e Cheet or aggi gan grading on the properties of concrete? -Describe kinds of slump.. OF MOON Cone. what is the approximate value of Flexural su compressive 10-What is the approximate value of spli compressive strength? nave 25 MPa tor strength if we have 25 MPa for

2. You are an inspector on a job site, inspecting strength tests from a job with a design strength of 4500 psi. A total of 12 tests were performed on concrete from this job; the strength test results (in psi) are shown below. 4520 4840 4190 4960 4720 4890 4620 4290 4390 4680 4550 4620 Is this concrete acceptable?

Q1 What moisture condition should the coarse and fine aggregate be in when mixing the concrete? A Unknown B Saturated C Oven Dry D Air Dried E SSD   Q2 What restriction is placed on the size of a sample of a concrete batch? A 30 L B 15 L C 20 L D 10 L E 5 L

Standard deviation is 3.6 MPa

Please give me both a and b answers a. If a concrete with 28 day compressive strength of 4500 psi is being poured, then it how much strength would you expect after 7 days(assuming good curing conditions)? Explain how you obtain the 7 day strength? b. Briefly explain the effect of water to  cement ratio on concrete strength?

Use metric please