What are the names of the famous four admixture companies in USA? Where

are their headquarter offices in USA? And in the world?

(2) What are the types of admixtures we should use in the following situations?

Pouring concrete in the cold weather

Pouring concrete in heavy reinforcement congested forms

High ways

Bridge pier caps

Building closed to the sea

(3) What are: HRWR, VM, AEA

(4) Name three situations that adding admixtures would be considered dangerous?

(5) Select one of the concrete applications to write a report about.

Please submit a draft of the following by October 18th: one page single spaced

Report Title

Table of Contents

Abstract

Objectives

Scope of Work

Estimate the total width of right-of-way (ROW) of a depressed divided rural

highway with three lanes in each direction. Show the median, shoulders lanes, side

slopes, and so on, with recommended dimensions on a cross-section of the highway

The construction industry is leveraging technology to make processes more efficient. Construction companies are investing a lot of their capital in R&D to incorporate this technology into their business practices. Explore one technology (existing or future) and provide a summary of the impacts it will have on the construction industry. Below are examples you may choose from but preferably you can find a different technology if you can find one.

Examples of technology (application, software, programs):

• Navisworks
• Structuresite
• Openspace
• Bluebeam
• Revit
• Docusign

Please write a summary of the technology and should answer the following questions:

1) Company name and how long has this application/program been around?

2) What impacts does it have on the construction process (good and bad)

3) What the future looks like for these type of technology

4) your opinion on how you would implement or what improvement you see in this type of technology.

A soil has a natural water content of 10%, specific gravity of 2.65, and porosity of 0.45.

a) Find the dry unit weight and degree of saturation.

b) If the optimum water content for the soil from a standard proctor was 20%, how much water would have to be added to 1m^3 of the soil to increase the water content to an optimum level?

1. List one thing you could you change about the mixtures to increase flexural or tensile strength and briefly explain your reasoning behind why that would increase the strength.

Balance the interior angles of the traverse by applying equal corrections to each angle. If the azimuth (from north) of side EA is fixed at 169° 46', calculate the preliminary azimuths of the remaining sides. Report in D-M-S format. Interior Angles: A = 96° 05'; B = 95° 20'; C = 65° 15'; D = 216° 22'; and E = 67° 08'.

There is a tunnel (open-faced shield) in dense clayey silt soil, what are the potential problems about the construction of this tunnel??? Explain!

Thank you

1. a) Use Manning’s to determine the velocity of flow and the capacity of the following pipes:

   • 300mm PVC main installed at a slope of 3%

   • 375mm PVC main installed at a slope of 3%

   • 450mm PVC main installed at a slope of 3%

2. b) Comment on the percent increase in capacity when changing pipe to a larger size in the previous question. (You will have an answer for 300mm to 375mm and an answer for 375mm to 450mm. Your answer should be a % difference)

During the month of December, the average river inflow to a reservoir is 10m3/s while the dam bottom outlet releases 22 m3/s. Rainfall is measured as 30 mm uniformly distributed within the month. The average seepage from the reservoir is estimated 0.79 m3/s. The surface areas of the lake are measured from aerial photos as 15 and 11 Km2 and also the staff gauge readings of water surface are recorded as 105m and 102m in the beginning and at the end of the month respectively. (The reservoir volume at the start of the month was 98000 ML.)

a) Calculate average daily evaporation from the lake surface in mm/day.

b) Estimate pan evaporation in mm/day

c) Estimate evaporation from the reservoir surface if average wind velocity is 2.5 m/s and relative humidity is 20%. The mean air and mean water temperatures are the same and equal 20o C. The vapour pressure is recorded as 31 mb.

two cylindrical specimens A and B of a soil were loaded as follows. Both specimen were isotropically loaded by a stress of 200 kpa under drained conditions. Subsequently, the radial stress applied on specimen A was held constant and the axial stress was incrementally increased to 440 kpa under undrained conditions. The axial stress on specimen B was held constant and the radial stress was incrementally reduced to 50 kpa under drained conditions. plot the total and effective stress paths for each specimen assuming the soil is linear. isotropic. elastic material.calculate the maximum excess pore water pressure in specimen A.

3. You are a construction engineer working for a large utility contractor. The project you are working on is in New York City (Manhattan). You are installing approximately 1,000 L.F. of 48” dia. RCP for storm drains. Invert elevation ranges from 9’ to 14’ below grade.
   • Pay lines for the trench are indicated in the attached specification.
   • Soil characteristics range from SM to SC, based on the Unified Soil Classification.
   • What considerations would you make with regards to a trenching & shoring specifications for this pipe run? Your considerations should include:
   • Working on active & congested city streets
   • Encountering of groundwater
   • Anticipate encountering other underground utilities crossing over the trench +/- every 10 L.F.
   • Soil removal, storage, & backfilling. Soil can be re-used as suitable fill, providing concrete encasement & pavement specifications are met (make an assumption for pavement details, based on previous class notes).
   • Shoring specifications (type). Shoring must conform to OSHA requirements

• NOTE: It is not necessary to design a shoring system or calculate soil volumes. The answer should be a procedural or methodology consideration.

Hydraulic engineering:

A trapezoidal channel that has a 15 foot bottom width, Manning’s roughness coefficient of 0.033, bed slope of 0.0021 ft/ft, symmetrical side slopes of 4H:1V (s = 4), and conveys 250 cfs. It is dammed up to a depth of 4 feet. How far back upstream will it take for the M1 curve to reach normal depth?

    a.   1,430 ft.

    b.   1,894 ft.

    c.   2,302 ft.

    d.   2,934 ft.

    e.   3,486 ft.

Describe (in details) 5 factors, based on which contractors would specify their fees in construction projects.