Assab Referral Hospital Construction
On account of inadequate regional healthcare facility at Assab, In January 2000, Southern Red Sea regional Eritrean Defense Force (EDF) needed to construct a referral hospital facility for the region at the outskirt city of Assab.
Enterprise: The Southern Red Sea Eritrean Defense Force (EDF) construction department, Assab, Eritrea
Construction Period: June 2000 – early 2006
The construction work incorporated ground plus one complex consists of an outpatient building (OPD) and 200-beds healthcare facility center. Besides that, there were additional service buildings. The healthcare facility encompasses sectors such as obstetrics and gynecology, orthopedics, surgical theater, Internal medicine, dentistry or Odontology, and pediatrics. Based on the data attained from the design documents, the surface area of the construction site was about 124 m2.
Figure 1 demonstrates a bird’s eye view of Assab hospital facility.
Figure 1 Building complex of Assab referral hospital.
Given that the region was a wasteland and situated by the side of the Red Sea, the ground was composed of a substantial quantity of salt. For that reason, all of the footings were constructed with salt resisting cement (Sulphate resisting cement). In Assab, it was common to notice premises ruined by salt. The salt moves up via capillaries and degenerates the wall surface and the columns of the building. Eventually, the reinforcement bars be corroded and fail to bear the load. Due to this reason, the usage of salt resisting cement was absolutely necessary for the construction of the foundation.
Sulphate Resisting Cement reduces the heat and has high sulfate, chloride, and saltwater resisting capability.
After transferring the salient points to the ground using surveying instruments such as theodolite and surveying level, the batter boards and construction lines were set to get started the excavation. The excavation or dirt removal from the foundation area was done by a mechanical excavator.
5 cm deep lean concrete were cast before the foundation formwork were placed. Figure 2 shows the lean concreting at Assab hospital construction site.
Figure 2 Lean concreting at Assab construction site
Mainly because the geological formation of the site was rocky and robust, the excavation depth did not actually need to be greater than 1.5 to 2m depth. The kind of the foundation utilized for the site was a Spread footing foundation with an individual foot size of around 120m*85cm and 45 cm depth. Then girder beam and all the columns were cast in-situ.
Figure 3a, 3b, and 3c demonstrate foundation and columns placement at the Assab hospital construction site.
Figure 3a Constructing the foundation and columns of Assab referral Hospital
Figure3b Single spread foot foundation utilized at Assab Hospital
Figure 3c Foundation formwork placement
Concrete Mixing Ratio
The standard mortar mix employed was B25, and for the foundation, beam, and columns concrete mix implemented with identical mix ratio. Which is a mix ratio of cement: sand: gravel of 1:2:4. Figure 4 shows concrete mixing machinery utilized at Assab hospital.
Figure 4 Movable concrete mixer utilized at Assab hospital
Standard Concrete mixing procedure was considered for this construction and the concrete pastes were inspected employing a fairly easy method known as slump test technique. Examining the concrete mix consistency is essential simply because it assists to prevent the effect of excess water in the mortar or concrete mix. The presence of excessive water can damage the structures as it simply leaves cracks in the building as soon as the water evaporates. Later, this will likely bring deterioration to the reinforcement bar, eventually causing untimely failure to the building. Hence, validating the concrete consistency is actually vital to avoid cracks in the building. Figure 5 shows the slump test procedure.
Figure 5 Slump test
Figure 6a and 6b show the skeleton of the OPD
Figure 6a Outpatient department construction in progress
Figure 6b First floor reinforcement placement
The Floors and the Roofs
The first floor was 15 cm thick reinforced slab. It has got a terrace at the left corner of the building for outdoor lounging. The roofing was likewise 15 cm concrete slab. Besides that, there exists a 50 cm parapet wall above the rooftop. Figure 7 shows the completed OPD building.
Figure 7 Assab referral hospital completed OPD building
The Responsibilities of the Engineers
The primary tasks of the engineers were regulating the concrete mix, assisting the foremen interpreting drawings, guiding the reinforcement bar cutting, bending and positioning (Bar scheduling), transmitting the design from the paper to the ground, guiding the excavation and supervising the construction in general.
Together with other pieces of machinery, there were concrete mixing machines both movable and stationed, vibrators, vehicles, and trucks etc.
The number of skilled and non-skilled personals took part in the construction were the following, two trained engineers, a co-engineer/aide engineer, a technician, a carpenter foreman, a mason foreman, several carpenters, and masons. Furthermore, 100s of non-skilled laborers used to come regularly from another infantry brigade. Almost all participants in this particular project were in the national military service except the four permanent members of the military who were employed and paid by the construction department of the defense force.
Cost of the Project
The cost of the project could be estimated based on the resources both human and materials. Nevertheless, due to the unavailability of the original plan, and material records at hand, it is difficult to estimate the cost.
Points to Highlight
Location: Assab Sekir, Eritrea
Construction surface Area: around 124 m2
Type: ground plus one building complex (OPD and 200 beds health facility center)