Houstons source for info on custom decorative concrete, drivewayS, patios, Stamped/patterned concrete, admixtures for concrete. Also offer links to other related resources

Wednesday, December 29, 2004

Houston Pier and Beam Concrete Foundations, Concrete Slabs, Piers, Drilling, Concrete Pouring, Foundation Repair

Houston Pier and Beam Concrete Foundations, Concrete Slabs, Piers, Drilling, Concrete Pouring, Foundation Repair
Greetings and Welcome to
ConcreteForever.Com © - Houston - Texas


Commercial Division - (713)696-9400
Pier and Beam Foundations - Post-Tension slabs & Retrofitting

New Foundations - Existing Foundation Repairs - Raising and leveling QUALITY SERVICE call (713)696-9400
We are Custom Concrete Constructors with State Certifications for Soil, Civil, Structual & topographical
Engineering in Houston TX.
We specialize in Residential, Commercial and light Industrial Concrete Foundations, Slabs, Piers and
Architectural Concrete Construction,.

Affordable Foundations with in house pier drilling, bellbottom, soil testing and engineering Turn-key
foundations, tilt-up's and retro-fitting, laser screed, ride on power trowels, steel forms and fabrication
services in Houston and south west Texas

ConcreteForever.com © recommends that a minimum of 2-3 borings be performed at each project site. Past
experience indicates that subsoils within a close proximity can vary significantly. The design soil parameters
should be developed on the basis of weaker soil boring conditions to minimize potential foundation sediment
displacement.

The four corner piers of a foundation of a residential dwelling should be drilled first to establish the proper
footing depth. The technician from ConcreteForever.com© recommends that a minimum of 2-3 borings be
performed at each project site.
The subgrade and fill soils under the floor slabs should be compacted to about minimum 95 percent of
uniform compaction, density and thickness. All deleterious material shall be removed prior to concrete
placement (ASTM D 698). Furthermore, the fill soils should be non-expansive. Atterberg limit tests should be
performed on the fill soils, obtained from the borrow pit, to evaluate the suitability of these soils for use as
structural fill and their shrink/swell potential.

Field density tests should be conducted on the subgrade soils and any borrow fill materials in the floor slab
and pavement areas by a technician from ConcreteFoundationContractors.com © . In the areas where
expansive soils are present, about 24 to 48-inches of structural fill is placed under the floor slab areas.
Laboratory proctor tests will also be performed on the on-site soils as well as off-site borrow fill materials to
evaluate the moisture-density-sediment relationship of each of these soils analysis.
Fill soils may have to be placed on the lots to raise the lot or to provide a buffer zone in between the on-site
expansive soils and the floor slabs. We recommend that the required thickness of the fill be verified by a
technician at concrete forever.com after the completion of the building pad. This task can be accomplished
by drilling two borings to a depth of five-feet in the building pad area, examining and testing the soils to verify
the fill thickness In the event that the structure is supported by drilled footings, we recommend that the
installation of the footings be observed by a geotechnical technician from concreteforever.com.

The four corner piers of a foundation of a residential dwelling should be drilled first to establish the proper
footing depth. The technician will conduct hand penetrometer tests on the soil cuttings to estimate the
bearing capacity of the soil at each footing location. He will make changes to the foundation depth and
dimensions if obstacles, groundwater or soft soils are encountered. Therefore, minimizing costly construction
delays. In addition, a technician from ConcreteFoundationContractors.com © will verify the bell size by a bell
measurement device. Two sets of concrete cylinders (eight cylinders) will be made for each day of pour. Four
cylinders will be broken at seven days, and four cylinders at 28 days
The concrete sampling and testing in the floor slab and placement areas will be conducted in accordance
with ASTM standards and the stringuent quality control at concreteforever.com- A technician from
ConcreteFoundationContractors.com © will monitor batching and placing of the concrete. Twelve concrete
cylinders will be made for each floor slab pour. Six concrete cylinders are tested at seven days and six
cylinders at 28 days.
The cost of performing quality control work will vary depending on project location and scope of work. We
have estimated the required number of hours and testing requirements for the above-mentioned services.
The details of our cost estimate are presented on Plate 1. In order to provide the most accurate estimate of
the testing and inspection services, the actual construction schedules are necessary. The standard cost of
testing and inspection services for this project ranges from 0.5 to 2.0% of the total new construction.
Services will be billed monthly, with payment due on presentation.

The team at ConcreteFoundationContractors.com © shall submit this document to the prospective home
owner for approval. This will enable the builder to construct a better quality foundation system for the
structure with much less liability exposure.
Proper geotechnical and quality control studies for residential projects in the Houston metro area will result in
a quality foundation system for residential structures installed by concreteforever.com - This will also
significantly reduce potential liability problems to the owners/designers. In general, the cost of performing
these studies are a minimal investment when compared to the total cost of the project and potential
foundation repair costs

We also can conduct hand penetrometer tests on the soil cuttings to estimate the bearing capacity of the soil
at each footing location. He will make changes to the foundation depth and dimensions if obstacles,
groundwater or soft soils are encountered. Therefore, minimizing costly construction delays. In addition, a
technician from ConcreteFoundationContractors.com © will verify the bell size by a bell measurement device.
Two sets of concrete cylinders (eight cylinders) will be made for each day of pour. Four cylinders will be
broken at seven days, and four cylinders at 28 days
The concrete sampling and testing in the floor slab and placement areas will be conducted in accordance
with ASTM standards and the stringuent quality control at concreteforever.com- A technician from
ConcreteFoundationContractors.com © will monitor batching and placing of the concrete. Twelve concrete
cylinders will be made for each floor slab pour. Six concrete cylinders are tested at seven days and six
cylinders at 28 days.

The team at ConcreteForever.com © shall submit this document to the prospective home owner for approval.
This will enable the builder to construct a better quality foundation system for the structure with much less
liability exposure.
Proper geotechnical and quality control studies for residential projects in the Houston metro area will result in
a quality foundation system for residential structures installed by concreteforever.com - This will also
significantly reduce potential liability problems to the owners/designers. In general, the cost of performing
these studies are a minimal investment when compared to the total cost of the project and potential
foundation repair costs


For Structures not exceeding 36' ft in height we would generally provide 1" gravel aggregate with 6 sacks of
pure Portland per cubic yard concrete with a maximum 4" slump. Once the concrete arrives on site you will
need to measure the concrete temperature. It is well known that the chemical reaction of cement with water is
exothermic and liberates a considerable quantity of heat during the curing period. When cement, water,
stone and sand are mixed together, a chemical reaction starts. This is between the cement paste and water.
In this curing process, the volume of the slab, and the inner pressure/strain exerted on the rebars will change
in a fashion that depends on the composition of the concrete mixture.

The curing process is affected by the water to cement ratio, the curing temperature, humidity and the
type of cement. Hydration is responsible for the hardening (strength) of the concrete. For concrete, the gain
in strength continues for a long time, and theoretically for an indefinite period of time. However, the strength
of the concrete reaches a peak within 7days. During this process something else happens. Water in the
concrete mixture will evaporate, resulting in a decrease in the volume of the concrete. The volume of
concrete also decreases due to re-arrangement of finer particles within the larger ones. The different
proportions of cement, water, air entrainements, admixtures and sand will bring about different temperatures,
pressure and strain variations within the concrete slab as well. The result of the volume change is strain, also
known as shrinkage strain, and this is responsible for some small cracks that may appear after the curing
process of an improperly optimized concrete mix, also aggrevating the thermal stresses induced during the
curing process may cause cracks within the structure, thus weakening it.

The maximum optimum temperature of the concrete cannot exceed 40.2 °C. The temperature change
measured within the concrete follows the same trend as the ambient air and surface temperatures
surrounding the slab but with a larger change in the initial stage and tailing off to the ambient temperature
with increasing time. Adjust air entrainment and tri-calcium silicate admixture proportions according to the
absorption component properties criteria.

The barometric pressure variables and humidity criteria need to be calibrated into the optimization
performance variables table (provided by a www.concreteforever.com on site project manager) prior to the
pour by a qualified engineer or by a one of the qualified Concreteforever.com technicians, as this will
determine the performance criteria and the optimum amounts of air entrainment and bi-calcium silicates
admixtures required to optimize the mix according to these variables

No comments: