Discuss the suitability of the following rock types in terms of their potential for Alkali Silica Reaction (ASR) when used as aggregates in concrete mix
. i) Granite
ii) Rhyolite
In: Civil Engineering
Explain the likely physical and chemical reaction of the limestone due to the effect weathering process, and give example.
In: Civil Engineering
The rock mass and material characteristics of an igneous rock are greatly influenced by the chemistry of magma and the tectonic settings in which they are formed. Based on the statement given, answer the following questions. a) Briefly explain the main difference between the texture of volcanic and plutonic igneous rock? (3b) Discuss how silica content affects the chemistry of magma? c) Explain the difference between the typical rock mass characteristics of plutonic and volcanic igneous rock? (d) Discuss the suitability of the following rock types in terms of their potential for Alkali Silica Reaction (ASR) when used as aggregates in concrete mix. i) Granite ii)
In: Civil Engineering
strength of aggregate types ,significance and
tests
I need report with 5 page at less
In: Civil Engineering
Please don't leave any questions to answer. If you are waiting for great feedback then that should be me. This questions are from surveying and spatial science
a). You are working in the Environmental Management section of a Local Government Council. Your Local Government area includes approximately 100 km of coastline, comprising a mix of beaches, coastal dunes, rocky shores and headlands. Some regions of the coastline are considered highly vulnerable to the effects of climate change. Along the coastline there are beachside communities, agricultural activities and natural bushland.
Carefully consider the environmental monitoring that may need to be undertaken in order for your Council to measure and manage the impacts of climate change. List and describe the surveying and spatial technologies and methods that might be required to collect, manage and analyse the spatial data required by the Council.
b). You have been employed by a company that provides services to the farming/agriculture sector: including grazing (cattle and sheep), broad acre cropping (grains), and intense, high-value horticulture (irrigated crops such as lettuce, cherries, stone fruit). The company has identified spatial technologies as an emerging opportunity to provide new services to their clients. List and describe four examples of how different spatial technologies can be applied to farming/agricultural business
In: Civil Engineering
Consider a residential building with 5 floors with two homes at every flat each having 3 m height. You want to design such a piping system that provides the same mass flow rate to all floors with same outlet pressure. Come up with such a piping system that uses only one pump for the whole installment. Draw your system, make your assumptions, and show your results with a case study.
In: Civil Engineering
It is necessary to pump twice as much water as can be handled by an existing small pump, which is now 5 years old. This pump can be sold now for $1200 or kept for 5 years, after which it will have zero salvage value. Operating expenses are $2500 per year.
If the pump is kept, a similar extra one must be purchased for $3500, with operating costs of $2000 per year; its salvage values after 5 and 10 years are the same as for the original (existing) pump.
A large pump, equal in capacity to two of the smaller pumps, costs $6200, with operating expenses of $4200 per year.
New machines have economic lives of 10 years with 1800 and zero salvage values at year 5 and year 10 respectively. Determine the best course of action if the MARR is 10%.
In: Civil Engineering
Interns,
Mr. Howell, the prestigious founder and owner of our company would like you to perform an analysis on the company’s weekly revenues. He is requiring that the current weekly marginal revenue be at least $5,000 per week and if it is not currently at that level how fast should sales be changing to reach the target marginal revenue level. The most current information regarding weekly revenues can be found in Mr. Howell’s email below.
To be solved using derivatives.
“Mr. Kleppin,
It has come to my attention that our weekly marginal revenues may not be at the minimum level of $5,000 per week as I required. According to the sales report, we are currently selling 1,000 DVD’s per week and sales are currently rising by 200 DVD’s a week (gotta love the Marvel Universe! Customers can’t get enough!). They also inform me that our current selling price is $20 and that the price is dropping by $1 per week to encourage more sales. I would like you, Mr. Kleppin, to give the interns a chance to earn one of the 10 available positions at the end of their internship by giving them the opportunity to do the analysis. Again, I need to know if we are at the minimum level of $5,000 per week in marginal revenue, and if not, at what level should our sales per week be at so as to achieve the minimum marginal revenue level.”
In: Civil Engineering
make a peg adjustment for the following notes:
When the wye level is at 1, the rod readings on P and Q are 0.750m and 2.766m respectively.
When the wye level is at 2, the rod readings on P and Q are 1.906m and 3.798m respectively.
Point 1 is on the same line PQ and midway between P and Q. Point 2 is on the same line as P and Q but not between them. Point 2 is 40m from P and 260m from Q. With the wye level at point 1
Determine the following for a level sight:
a.) Rod reading (m) at P
b.) Rod reading (m) at Q
In: Civil Engineering
Imagine that you are assigned in a road way project and you found out that the soil is a non-cohesive week soil, design a work plan in order to stabilize this soil, taking into account the cost, materials, labor and the strength to be obtained
In: Civil Engineering
A -3.4% grade intersects a 4.2% grade at STA 5+180 at an elevation of 125.98. A vertical curve of length 120m is to be run forward from the point of intersection, and a curve of length 80m is to be extended back forming an unsymmetrical curve.
a.)Determine the elevation of the lowest point.
b.)Determine the elevation of the second quarter point on the curve.
In: Civil Engineering
Use diagram to explain the layout of domestic (cold) water system from the underground main pipe to the inspection chamber (manhole). Label all piping and fittings.
In: Civil Engineering
Describe laboratory and geophysical methods to measure intact rock strength. Explain why measurements of rock strength alone are insufficient to assess the difficulty of excavation and the likely stability of the rock mass during and after construction.
In: Civil Engineering
please paraphrase and don't use paraphrasing tool
please please make you work readable.
The primary cause of "plastic shrinkage" cracks is the
rapid evaporation of water from the surface of the concrete.
Immediately after the concrete has been placed, the particles
within the concrete begin to settle. When the particles settle, the
water within the concrete displaces and rises to the top. This
process is better known as "bleeding." Not all of the water within
the concrete displaces. Under most weather conditions, some of the
water on the surface of the concrete evaporates. The rate of
evaporation depends on factors such as the temperature of the
concrete, temperature of the air, relative humidity, and wind
velocity surrounding the concrete. Table 1 shows how different
weather conditions and properties effect the rate of evaporation.
The highest evaporation rates are obtained when the concrete and
air temperatures are high, when the relative humidity of the air is
low, when the concrete temperature is high compared to the air
temperature, and when a strong wind is blowing over the surface of
the concrete. The rapid evaporation of water at the surface is most
associated with placing concrete in hot weather conditions.
However, plastic shrinkage cracks can also form in cold weather
conditions when the temperature of the concrete is high compared
with the surrounding air temperature. When the temperature at the
surface creates an evaporation rate that exceeds the rate of water
produced by the bleeding process, the water film disappears and the
top surface of the concrete begins to shrink. When the evaporation
rate exceeds1.0 kilogram per square meter per hour, it is almost
certain that plastic shrinkage cracks will develop (Figure 1). When
the evaporation rate is greater than 0.5 kilogram per square meter
per hour cracking is possible.
Plastic shrinkage cracks typically occur on horizontal
surfaces exposed to the atmosphere. These cracks are different from
other early cracks because they are deeper and wider. Plastic
shrinkage cracks are typically two to four inches deep and
approximately one-eighth inch wid.
If you want you can SUMMARIZE in another words as well Sir
In: Civil Engineering
for certain rainfall data, the standard deviation Sx = 3.4 mm. If the Normal distribution was used and the 10 year rain x10 = 34.1 mm, then the 2 year rain x2 is:
6.82 mm
29.74 mm
31.72 mm
38.18 mm
In: Civil Engineering