#THEHOUSE
DOLMEN srl PROJECT AND SERVICES FOR ENGINEERING
C.M.F Casseforme Italia Precast construction system
Dolmen s.r.l. is a company for engineering services that was born in 1992. It is the result of the work experiences of a highly professional staff with a twentyyears work in civil and industrial building sector both in Italy and abroad.
Dolmen s.r.l. is specialized in the precast field. Dolmen s.r.l. has already dealt successfully in the past with this type of challenges: • • • • • •
Construction and management of a precast factory; Management of a technical office for precast production; Design and construction of industrial buildings; Civil engineering works (bridges, roads, infrastructure, etc..); Design and construction of commercial buildings (shops, malls); Precast system for affordable houses in developing countries.
C.M.F. Casseforme Italia works for more than thirty years in the precast field. C.M.F. Casseforme Italia is a company specialized in design and construction of precast production plants. Through a collaboration between the two companies can provide services ranging from design and construction of the factory and the production plant to the assembly of the finished product.
Who are we?
The concept of precast construction includes those buildings, where the majority if structural components are standardized and produced in plants in a location away from the building, and then transported to the site for assembly. These components are manufactured by industrial methods based on mass production in order to build a large number of buildings in a short time at low cost. The main features of this construction process are as follows: • • • •
The division and specialization of the human workforce; The use of tools, machinery, and other equipment, usually automated, in the production of standard, interchangeable parts and products; Compared to site-cast concrete, precast concrete erection is faster and less affected by adverse weather conditions; Plant casting allows increased efficiency, high quality control and grater control of finishes.
This type of construction requires a restructuring of entire conventional construction process to enable interaction between design phase and production planning in order to improve and speed up construction.
Why precast concrete?
Very important in the system of prefabrication is the design phase of the building artefact in order to allow the operation of the entire system (production and assembly). The constructive details studied in the phase of design and engineering are designed in a much more detailed than the traditional construction system, this leads to significant advantages in terms of product quality and economic control of the same.
The precast elements (walls, roof‌) can be designed to meet the needs of the environment weather construction.
Design process
In design of precast members and connections, all loading and restraint conditions from casting to end use of the structure should be considered. The stresses developed in precast elements during the period from casting to final connection may be more critical than the service load stresses. Special attention should be given to the methods of stripping, storing, transporting, and erecting precast elements. When precast members are incorporated into a structural system, the forces and deformations occurring in and adjacent to connections should be considered. The structural behaviour of precast elements may differ substantially from that of similar members that are monolithically cast in place. Design of connections to transmit forces due to shrinkage, creep, temperature change, elastic deformation, wind forces, and earthquake forces require special attention. Details of such connections are specially important to insure adequate performance of precast structures.
Design process
Rough and Tough The strength of precast concrete gradually increases over time. Other materials can deteriorate, the load-carrying capacity of precast concrete is deriver from its own structural qualities and does not rely on the strength or quality of the surrounding backfill materials. Studies have shown that precast concrete products can provide a service life in excess of 100 years. In severe conditions, additional design options are available to extend the life of concrete products.
We’re Talking Quality Here Because precast concrete products typically are made in a controlled plant environment, they exhibit high quality and uniformity. Problem affecting quality typically found on job site- temperature, curing conditions, poor craftsmanship and material quality- are nearly eliminated in a plant environment.
Engineering Precast concrete system is supported by engineering specific to both the particular assembly and production methods and to the project site conditions. The constructive details studied in the phase of design and engineering are designed in a much more detailed than the traditional construction system, this leads to significant advantages in terms of product quality and economic control of the same
Precast concrete system have many advantages over competing materials
The phases of the system are as follows: •
Construction of the production plant or setting of an existing plant;
•
Development of the project of the houses according to the standards and requirements of the customer;
•
Start of production in factory;
•
Assembly on building site.
Important to remember, that the plant, once made, can be used for the production of other types of architecture and civil engineering (schools, hospitals, bridges, etcc ....).
Phases of the system
Manufacturing plant The first operational phase consists of the construction of the manufacturing plant. Obviously, the size of the same depends on the amount of houses that you want to produce, and the speed with which you wish to accomplish.
The engineers of Dolmen Srl have more than thirty years of experience in the production of precast concrete elements.
The Factory
The Factory
The Production plant – Design and construction
HOUSING FIELD Developing countries needs Costs building control; Use of raw materials readily available; Use of not specialized local labor.
At the base of the project, we can detect the will to carry, in those places where the houses will be built, all the technical skills and resources necessary for the realization of an industrial building system. In particular, the prefabricated system, it is proposed to combine the requirements relating to a high level of efficiency in terms of cost and resources. It does not require the use of specialized labor for its implementation and can be used for a great variety of building types.
Think global, act local
Italy
Tunisia
Romania
Argentina
India
Saudi Arabia
Nigeria
Spain
Russia
U.A.E.
Ghana
Ivory Coast
Portugal
Bosnia
Libya
Countries where we already worked
At the basis of our system there is the desire to use raw materials easily available in developing countries. In this particular case, the raw materials used are as follows: • Cement • Aluminum • Steel • Wood
Cement Raw materials - Commodities
Aluminum
Steel
Wood
Roofing with fiber cement or aluminum panels.
Wooden trusses.
Gable with fiber cement panels.
Bearing structure with precast reinforced concrete panels. insulating panels can also be produced thermally.
Concrete foundation.
Elements
The system allows to realize different types of thermal insulation for the best possible adapt to different types of weather situations. Inside the panel is always inserted an insulating layer made ​of polystyrene. This layer may have different thicknesses depending on the needs of the customer. This is the easiest solution for thermal insulation. We performed the thermal analysis in order to ensure maximum thermal comfort inside buildings.
Internal plaster finishes Concrete layer
Polystyrene insulation layer
Concrete layer
External plaster finishes
Elements
A more efficient solution involves the use of a double layer of insulation. This type of solution allows to achieve high levels of energy efficiency and thermal comfort.
The level of thermal insulation required by the customer can also be achieved with other types of technical solutions which provide a detailed thermal design of the building.
Internal plasterboard
Internal polystyrene layer Concrete layer Polystyrene insulation layer Concrete layer
External plaster finishes
Elements
Assembly
MaisonIvoire – Affordable houses for Ivory Coast government
Client: Governative
Location: Abidjan – Cotè D’Ivoire Project: Executive project an construction management for the realization of 5.000 low price houses in Cotè D’Ivoire Contract: Executive management
project
and
construction
Dimension: 5.000 houses Material: Concrete precast
MaisonIvoire – Affordable houses for Ivory Coast government
MaisonIvoire – Affordable houses for Ivory Coast government
MaisonIvoire – Affordable houses for Ivory Coast government
MaisonIvoire – Affordable houses for Ivory Coast government
MaisonIvoire – Affordable houses for Ivory Coast government
MaisonIvoire – Affordable houses for Ivory Coast government
First stage: Production of elements in plant
MaisonIvoire – Affordable houses for Ivory Coast government
First stage: Production of prefabricated bathrooms
MaisonIvoire – Affordable houses for Ivory Coast government
Second stage: Construction of foundations
MaisonIvoire – Affordable houses for Ivory Coast government
Third stage: Installation of prefabricated elements
MaisonIvoire – Affordable houses for Ivory Coast government
Fourth stage Installation of prefabricated bathroom inside the house and construction of the roof
MaisonIvoire – Affordable houses for Ivory Coast government
Fourth stage Installation of prefabricated bathroom inside the house and construction of the roof
MaisonIvoire – Affordable houses for Ivory Coast government
Fifth stage: Finishing
MaisonIvoire – Affordable houses for Ivory Coast government
MaisonIvoire – Affordable houses for Ivory Coast government
MaisonIvoire – Affordable houses for Ivory Coast government
HouseNigeria – Compound houses for Nigerian oil companies
Client: Private Location: Port Harcourt – Nigeria Project: Executive project an construction management for the realization of 1.000 houses
Contract: Executive management
project
and
construction
HouseNigeria – Compound houses for oil companies
Third stage: Installation of prefabricated elements
HouseNigeria – Compound houses for oil companies
Fifth stage: Finishing
HouseNigeria – Compound houses for oil companies
Fifth stage: Finishing
HouseNigeria – Compound houses for oil companies
Day 3
Day 7
Day 5
Modular Pre-Casting construction with BCA Concrete.
Description: The term BCA originated in France which literally means «cellular reinforced concrete». The Concrete is mixed using the normal components of reinforced concrete with chemical additives wich creates miniature foam bubbles. The physical characteristics and stregth of the resultant concrete is not reduced. However, the weight is significantly reduced and that at the same time the concrete acquire insulation properties, both temperature and acoustical.
Day 10
HouseNigeria – Compound houses for oil companies
HouseLibya – Compound houses for oil companies
Client: Private Location: Tripoli – Libya Project: Executive project an construction management for the realization of 1.000 houses
Contract: Executive management
project
and
construction
HouseLibya – Compound houses for oil companies
HouseLibya – Compound houses for oil companies
HouseArgentina – Affordable houses Argentine government
Client: Governative Location: Argentina Project: Executive project an construction management for the realization of 3.000 houses
Contract: Executive management
project
and
construction
Information: The complexity of this project is correlated with the elevated number of houses that dolmen must realize in only 2 years.
• • • • • • •
Gonzàles Catàn: 1236 units San Francisco Solano: 1838 units Florencio Varela: 1464 units Nueva San Carlos (Moreno): 491 units Berisso: 336 units Gral. Pacheco (tigre) 338 units Merlo: 175 units
HouseArgentina – Affordable houses Argentine government
HouseArgentina – Affordable houses Argentine government
HouseArgentina – Affordable houses Argentine government
HouseArgentina – Affordable houses Argentine government
HouseArgentina – Affordable houses Argentine government
HouseGhana – Affordable and luxury houses for Zoe City project
Client: Private Location: Accra - Ghana Project: Executive project an construction management for the realization of 3.000 houses
Contract: Executive management
project
and
construction
HouseGhana – Affordable and luxury houses for Zoe City project
HouseGhana – Affordable and luxury houses for Zoe City project
HouseGhana – Affordable and luxury houses for Zoe City project
HouseGhana – Affordable and luxury houses for Zoe City project
HouseGhana – Affordable and luxury houses for Zoe City project
HouseGhana – Affordable and luxury houses for Zoe City project
HouseGhana – Affordable and luxury houses for Zoe City project
HouseItaly – Affordable multilevel houses
Client: Public – Munipality of Carini (PA)
Location: Carini (PA)– Italy Project: Low price housing
Contract: Design - Construction management Project Timing: 1994 – 3 months Realization Timing: 1995/1996 – 12 months
Material: Concrete precast
HouseItaly – Affordable multilevel houses
HouseItaly – Affordable multilevel houses
We work with tangible and intangible resources for an architecture that respects the environment and human needs
C.M.F. Casseformi di Mor Francesco - 13, Via delle Monache, Calvagese della Riviera, Brescia, Italy tel(+39) 0306000020 fax (+39) 0306000009 E-mail: info@cmf-casseforme.com www.cmf-casseforme.com Dolmen s.r.l. - 17, Via Val Paradiso, Carini ,90044, Palermo, Italy tel(+39)0918680498 fax (+39) 0918680506 E-mail: dolmensrlingegneria@gmail.com www.dolmensrlingegneria.it
Let’s bring out the best in precast