A cement grinding mill “A” with a capacity of 50 tons per hour utilizes forged steel grinding balls costing ₱ 12,000 per ton, which have a wear rate of 100 grams per ton cement milled. Another cement mill “B” of the same capacity uses high chrome steel grinding balls costing ₱ 50,000 per ton with wear rate of 20 grams per ton cement milled. Determine the more economical grinding mill, considering other factors to be the same.

A cement grinding mill “A” with a capacity of 50 tons per hour utilizes forged steel grinding balls costing ₱ 12,000 per ton, which have a wear rate of 100 grams per ton cement milled. Another cement mill “B” of the same capacity uses high chrome steel grinding balls costing ₱ 50,000 per ton with wear rate of 20 grams per ton cement milled. Determine the more economical grinding mill, considering other factors to be the same.

Fundamentals Of Construction Estimating

4th Edition

ISBN:9781337399395

Author:Pratt, David J.

Publisher:Pratt, David J.

Chapter10: Pricing Excavation And Backfill

Section: Chapter Questions

Problem 7RQ

See similar textbooks

Similar questions

A company uses a milling machine that operates with crushing spheres has a capacity of 50 tons per hour and has an operation cost of P6000 per 500 kg and a wear rate of .05 kg per 500 kg of ground cement. They are offered another machine of the same capacity using high chrome steel crushing spheres with an operation cost of P50,000 per 1000 kg and a rate of wear equivalent to .02 kg per 1000 kg of ground cement. Assuming all other factors similar, should the company purchase a new machine or not? Show complete solution (1 ton = 1000 kg)
Answer the following, a) Given a Concrete Mix Ratio of 1:2:3, what is the computed number of cement bags per cubic meter of concrete? b) Given a Concrete Mix Ratio of 1:2:4, what is the computed required volume of gravel for 1 cubic meter of concrete? c) A team of 2 skilled mason and 4 laborers are assigned to work on a 20 cubic meter volume of concreting work. They finished the job in 5 days, working 8 hours a day. What is there Productivity rate for the activity? d) A concrete vibrator was rented for concreting works. Rent is at 750 Pesos per day. Concrete pouring was computed to be completed in 5 days, but was actually finished in 4 days. How much was budgeted for equipment rental? e) My database for Formworks and Falseworks Unit cost is Php 1, 040 per sq. m. If I am to Construct 4 columns with height of 2.5 meters per column and Cross section of 0.3m x 0.4m, How much should my budget be for my formworks and falsework- based on the Unit cost?
What is maximum probable yearly aggregate loss (MPY) and estimated maximum loss (EML) and describe their application.
Q.4 (a) A new concrete bridge is to be constructed near the sea and its design has to incorporate features protecting it from exposure to marine environments. Among these, a new coating system is being proposed for concrete. You have been awarded a six-month contract to evaluate this system and materials involved. Describe the major parts of your programme, assuming that you also have access to a structure on which the coating has recently been used.
Suppose you are assigned as a material engineer for a construction of a dam that requires mass-concrete construction.a) Which type of cement will you recommend? Explain your answer in detail.b) If the cement you selected is not available, what other construction methods will you recommend?
Coarse aggregate is placed in a rigid bucket and rodded with a tamping rod to determine its unit weight. The following data are obtained:Volume of bucket = 14 LWeight of empty bucket = 9.21 kgWeight of bucket filled with dry rodded coarse aggregate:Trial 1 = 34.75 kgTrial 2 = 34.06 kgMeasureSampleA B CWet Mass (g) 521.0 522.4 523.4Dry Mass (g) 491.6 491.7 492.1Absorption (%) 2.5 2.4 2.3Table P 5 . 9 determine the amount of water required to increase the moisture content of aggregate to reach absorption?5.9 Three samples of fine aggregate have the properties shown in Table Trial 3 = 35.74 kga. Calculate the average dry-rodded unit weightb. If the bulk dry specific gravity of the aggregate is 2.620, calculate thepercent voids between aggregate particles for each trial.
The crushed stone output from a 36-by 42-in. crusher, with a closed opening of 2 ½ in (output is 50 tph)., is passed over a single horizontal vibrating screen with 1 ½ in. openings. If the permissible screen efficiency is 90%, use the information from Peurifoy to determine the minimum-size screen, expressed in square feet, required to handle the output of the crusher. please show complete solution use 4 decimal places
What can you conclude if the specific gravity of hydraulic cement I acquired is 3.14? How this will affect the concrete mix and the products it will produce? Does the construction works will stay strong and longer or not? Explain Also, what is the importance of this experiment of determining the specific gravity of hydraulic cement in construction works?
A simple platform having a stair will be constructed, as an estimator, your boss gave you an assignment to estimate the concrete works needed for the stairs only. The width of the stair is exactly 1 meter. Using Class "A" mixture, how many cu.m. of gravel is needed for the project? Note: The values are not rounded to the nearest 50ths; use the exact value instead. 1.75 cu.m. 1.95 cu.m. 2.15 cu.m. 1.65 cu.m.
A simple platform having a stair will be constructed, as an estimator, your boss gave you an assignment to estimate the concrete works needed for the stairs only. The width of the stair is exactly 1 meter. Using Class "A" concrete mixture, how many 40 kg bags of cement is required? 20 15 16 18
A cement grinding mill “A” with a capacity of 50 tons/hr utilizes forged steel grinding balls costing P12T/ton, which have a wear rate of 100 grams/ton cement milled. Another cement mill “B” of the same capacity uses high chrome steel grinding balls costing P50T/ton with wear rate of 20 grams/ton cement milled. Determine the more economical grinding mill, considering other factors to be the same.
A customer estimates that he is getting 30 cubic yards(loose) of gypsum in his scraper. Determine the percentoverload if the load estimate is correct. The maximum loadcapacity of the scraper is 84,000 pounds.