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Understanding the Curing Process of Precast Concrete


Modular Home made from Precast Concrete When most people think of curing, they think only of maintaining moisture on the surface of the precast concrete. But curing is more than that—it is giving the precast concrete what it needs to gain strength properly. Precast concrete strength depends on the growth of crystals within the matrix of the concrete. These crystals grow from a reaction between Portland cement and water—a reaction known as hydration. If there isn’t enough water, the crystals can’t grow and the concrete doesn’t develop the strength it should. If there is enough water, the crystals grow out like tiny rock-hard fingers wrapping around the sand and gravel in the mix and intertwining with one another.

The other important aspect of curing is temperature—the precast concrete can’t be too cold or too hot. As fresh concrete gets cooler, the hydration reaction slows down. The temperature of the precast concrete is what’s important here, not necessarily the air temperature. Below about 50 F, hydration slows down a lot; below about 40 F, it virtually stops.

Methods for Curing the Precast Concrete

There are four different types of curing methods used for a precast concrete;

Water cure

The concrete is flooded, ponded, or mist sprayed. This is the most effective curing method for preventing mix water evaporation. Make sure you allow proper time for water curing.

Water retaining methods

Use coverings such as sand, canvas, burlap, or straw that is kept continuously wet. The material used must be kept damp during the curing period.

Waterproof paper or plastic film seal          

Waterproof paper or plastic film seal is applied as soon as the precast concrete is hard enough to resist surface damage. Plastic films may cause discoloration of the concrete-do not apply to concrete where appearance is important.

Chemical Membranes

The chemical application should be made as soon as the precast concrete is finished. Note that curing compounds can affect adherence of resilient flooring, your flooring contractor and/or chemical membrane manufacturer should be consulted.

In case you still have question about modular homes and insulated precast foundation, you may contact Legendary Homes Inc in Jackson, Michigan. A representative will be happy to assist you. Meanwhile you can check our modular home price sheets by signing up to our blog

Topic: Precast Concrete

 

 


Why Precast Concrete Basement Walls Have Cracks?


Modular Home with Precast Concrete BasementIn order to better understand some of the reasons why precast concrete basement walls will develop cracks, we first need to look at the concrete itself.

Composition of the Precast Concrete

Precast concrete is composed of 4 major elements, which are the aggregate, cement powder, chemical catalyst and water. Aggregate is usually a fine sand and a stone or gravel base. Cement powder base is a mixture of calcium, silicone, aluminum and iron. Then a chemical catalyst is the element added to promote curing. The final element is water.

Factors Affecting the Precast Concrete Basement

For example a 24 by 24 modular home basement with 8 foot tall walls at 10 inches will require about 24 cubic yards of precast concrete as well as over 4000 gallons of water. As those water cures out there is the possibility of shrinkage and cracking. Increasing the volume of water to 8 gallons per unit will result to about 40 % loss of compressive strength to the basement walls.

Other factors such climate conditions and the existence of re-enforcing metal bars can also play a part in the formation of modular home basement wall cracks. If the weather to wet or cold the concrete may cure to slowly to hot and dry and the concrete may cure too rapidly. Re-enforcing bars, know as rebar, are designed to limit movement and cracking. Unlike in the past, modular homes have re-enforcing rebar incorporated into the precast concrete foundation.

However precast concrete foundation wall cracks are not the only points that water may leak into the basement through the wall. Two of the other additional issues are old tie form holes and honey combing. When the foundation walls are poured there are metal rods used to hold the inner and outer wall forms together. After the forms are pulled the tie rods are snapped off next to the foundation. Over time excessive moisture will cause the metal to rust away leaving an open gap for water seep through. Honey combing refers to a portion of the foundation were the concrete was not properly shifted as it is poured. The end result is a gravel pocket where the finer cement mix did not get incorporated into the aggregate leaving open gaps for water egress to occur.

Despite the fact that basement wall cracks are inevitable you are assured not all of them will leak. However you can be one of the unlucky homeowners whose crack does develop seepage. Don’t worry as there are in-expensive, proven methods of repair available.

In case you still have question about modular homes and insulated precast foundation, you may contact Legendary Homes Inc in Jackson, Michigan. A representative will be happy to assist you. Meanwhile you can check our modular home price sheets by signing up to our blog

Topic: Precast Concrete


Production and Characteristics of an Insulated Precast Foundation


Modular Home on an insulated precast foundationNowadays the insulated precast foundation and walls of a modular home can be made at the same time. This practice saves large amounts of time and money, which makes construction more effective and high quality. Moreover when concrete for insulated precast foundation is formed on the factory, rain and high levels of moisture in the air cannot severely affect the construction process as rain does not interfere with the curing process. Therefore since precast concrete comes handy, most modular home builders use it and we must discuss its production and characteristics.

Characteristics of an Insulated Precast Foundation

Insulated precast foundation is made from precast concrete which contributes to increased fire resistance, smooth surfaces, and increase quality of the structure. These are some of the characteristics which make the precast foundation popular among modular home builders and home buyers.

With its many benefits, insulated precast foundation is predominantly viewed as a commercial and/or industrial key element.  More recently insulated precast foundation is being used in the construction of condominiums, apartments and some single family homes. Homes or structures with an insulated precast foundation tend to receive lower insurance premiums due to their durability and fire resistance ability.

Insulated Precast Foundation Production

The construction of insulated precast foundation starts with the formation of precast concrete in a secure and controlled factory to ensure concrete is cured properly. Ideal conditions help control the environment so the best product is produced.

​Precast concrete use by insulated precast foundation advocates is set in a form which is used to shape the concrete that is poured into it. The form is first lubricated so the concrete is easily removed. The poured concrete is allowed to mostly cure, and then removed. By the time the precast concrete reaches the job site, it’s completely cured.

In case you still have question about modular homes and insulated precast foundation, you may contact Legendary Homes Inc in Jackson, Michigan. A representative will be happy to assist you. Meanwhile you can check our modular home price sheets by signing up to our blog

Topic: Insulated Precast Foundation


How Money and Time Influence the Realization of Insulated Precast Foundation


Modular Home on an Insulated Precast Foundation

Modular Home in Michigan

Having an insulated precast foundation can be a very attractive and efficient option for modular homes. Yes, the quality and durability of the panels are important to a retailer, but the key deciding factors for using precast are reduced construction time and competitive costs compared with other exterior building wall systems.

There are a number of advantages that make insulated precast foundation an attractive alternative for retailers. In order for precast to be selected, it really needs to meet two needs: reduction in construction time so that stores can open more quickly, and competitive pricing compared with other exterior wall systems. To get a retailer’s attention, you need to be able to demonstrate satisfaction of both of these criteria.

Cost of Insulated Precast Foundation

So why should your modular home have an insulated precast foundation? Cost can be a significant factor. Getting the precast foundation installed is tedious for the pocket, but the cost has benefits of a shortened construction schedule and of efficient and high quality foundation.

While the initial cost of precast panels may be higher than other foundation walls, a detailed cost comparison may reveal that insulated precast foundation construction compares favorably with the other methods.

Insulated precast panels can be used for spans with little or no additional reinforcing. More and more jurisdictions are requiring taller parapets to screen rooftop equipment. At the same time, recent building codes have more than doubled the required design wind load on parapets. Structural precast panels are better able to handle these cantilevered loads.

Schedule of Constructing an Insulated Precast Foundation

The time savings can also be considered a cost benefit when considering an insulated precast foundation. A shortened construction schedule means a reduction in job-site overhead, such worker’s salaries, trailer and utility fees,that result in significant savings.

A cost comparison should include both short-term and long-term cost savings. By using integrally colored concrete panels in lieu of painted CMUs, both the costs for initially painting and then repainting every few years will be reduced. The increased thermal mass of precast walls also reduces temperature swings, which can reduce heating and cooling costs. These maintenance cost reductions may make the life-cycle comparison of using precast walls competitive even if the initial costs are higher.

In case you still have question about modular homes and insulated precast foundation, you may contact Legendary Homes Inc in Jackson, Michigan. A representative will be happy to assist you. Meanwhile you can check our modular home price sheets by signing up to our blog

Topic: Insulated Precast Foundation


Factors Affecting the Construction of Insulated Precast Foundation for Modular Homes


Modular Home and Insulated Precast FoundationMany have been considering the installation of an insulated precast foundation for their modular homes for a number of reasons. From our experience, it boils down to quality and efficiency of construction as well as the affordability of the construction cost. Insulated precast foundation wall panels can be a very attractive design option for exterior walls. Yes, the quality and durability of the panels are important to a modular home owner, but the key deciding factors for using precast are reduced construction time and competitive costs.

With the demand for having an insulated precast foundation, several home buyers are looking for the factors that may delay or complete the construction faster. That is why we are presenting some of the known consideration in the erection of the precast foundation for modular homes;

Materials Used in Insulated Precast Foundation

Most precast companies have computer controlled batching and mixing plants. Complex mixes for a variety of different concrete products are stored in the batching plant systems. This is an important facility since accurate sand/cement/gravel/water mix is critical to the integrity and durability of precast components.

Schedule of Construction

The production of precast components is scheduled to meet the production program. Machine changes and mould alterations are kept to a minimum to achieve the most efficient batch production. This can only be achieved with the co-operation of the entire project team.

Competitive Cost of Insulated Precast Foundation

So why isn’t every home owner has insulated precast foundation? Cost can be a significant factor. Getting your retail store open earlier is desirable, but if the cost of the precast panels is more than CMU or tilt-up wall systems, it can eat into sales profits, and thus the benefits of a shortened construction schedule could be reduced or eliminated altogether.While the initial cost of insulated precast foundation panels may be higher than tilt-up or CMU walls, a detailed cost comparison may reveal that precast construction compares favorably with the other methods.

In case you still have question about modular homes and insulated precast foundation, you may contact Legendary Homes Inc in Jackson, Michigan. A representative will be happy to assist you. Meanwhile you can check our modular home price sheets by signing up to our blog

Topic: Insulated Precast Foundation

 

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Todd was full of information and it was great to see a CLEAN home! My husband is glad to hear that u can sub co tract everything out so there is no worry on our end if we choose to go that way. I really enjoyed seeing the pictures of the different styles of homes you have built.

Apr 30, 2013
Jennifer Plank

We first met Todd Rutledge from Legendary Homes of Jackson MI online while we were searching for a new home. After our first conversation with him, we felt that he was honest and trustworthy. These feelings were confirmed by another of his clients who let us see her home and told us of her experiences working with Todd. Todd arranged a visit to the Redman Homes factory for us so we could see for ourselves how they are made and their quality. Todd helped us thru the process of selecting what we wanted in our home. He made himself available to answer our questions thru out this building process. If he didn't know all the answers, he found out and got back with us promptly. We now are the Happy owners of our Redman home and are very thankful to Todd Rutledge of Legendary Homes for his help. Sincerely, Burt and Mary Hooker 5/16/13

May 18, 2013
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May 25, 2013
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