Essay PreviewMore ↓
As mentioned in the paper, the research program was divided in to four major phases commenced from preliminary feasibility study of experiment to concluding testing and evaluation of intended material properties. In this study, finding prospective microgravity environment with enough time for experiment (basically for concrete mixing and curing) and flexible hardware interface for specialized experimental devices were the foremost challenges for the successful research. The author’s state that they explored four earth based microgravity environment from the different sources, NASA Space Shuttle was the most convenient one because it could provide sufficient time of microgravity environment for experiment and, fortunately, there was an additional NASA’s GAS (Gas Away Special) experimental program for the purpose of supporting use of space for all the researchers. After all, the researchers set the experimental program entitled as Conic (Concrete Curing and Mixing in Microgravity).
For such experiment, design of fully automated concrete mixing chamber in microgravity environment was the challenging task for the researchers although it is somewhat simple effort on earth. Reviewing the preceding research literatures and exercising many prototype models, eventually, they succeeded to develop a mixing chamber controlled by the microprocessor by means of autonomous specialized hardware system.
In this study, many experiments on earth confirmed that mortar was better than concrete regarding as block and jam action of mixing blades by coarse aggregate in concrete. Eventually, they established the most suitable design proportion of mortar as 1.25 parts type I portland cement, 1.25 parts ASTM C109 standard sand, 0.5 parts water and 8 floz/cwt of water reducing admixture.
Observing the experimental schedule in paper, it is seen that researchers have completed the entire task and looked forward for the final shuttle flight.
How to Cite this Page
"Using Lunar Soil for Construction in Space." 123HelpMe.com. 15 Aug 2018
Need Writing Help?
Get feedback on grammar, clarity, concision and logic instantly.Check your paper »
- The amazing technology that was used in the construction of Palm Islands in Dubai. In construction, technology may be used as means to perfect, accelerate the time of construction and perform the seemingly impossible. Palm Islands was a complex project in the sense that only natural materials were used and the shape was somewhat peculiar. This land reclamation project increased Dubai’s shoreline by 75km where 94 million cubic meters of sand and 5.5 million cubic meters of stone were used to create the palm shaped island on which luxury villas and hotels were to be later built, C.Gibling (2013, pg 4).... [tags: technology, construction]
1490 words (4.3 pages)
- Soil erosion began with the dawn of agriculture, when people abandoned their hunter-gatherer lifestyles and began using the land for intensive agriculture, thus removing the protective vegetation cover and growing food crops on disturbed soil surfaces. For many civilizations, it is believed that surface wash erosion, that can occur unnoticed until it is too late, was a main contributing factor for their demise. Soil erosion and other degradative processes have destroyed, over the millennia, as much arable land as is now cultivated.... [tags: Soil Erosion]
310 words (0.9 pages)
- The bearing capacity of of soil is an important consideration in construction projects. The bearing capacity of soil is the pressure that a soil sample can support without collapsing. Bearing capacity varies with different soils cohesion. Cohesion is the force that holds together molecules and particles inside soil. Rock is a continuous mass of solid mineral material, such as granite or limestone, that can only be removed by drilling or blasting. Rock is never completely formed of a single large segment, but is crossed by a system of joints that divide it into irregular blocks.... [tags: civil engineering consideration]
601 words (1.7 pages)
- Bioretention has rapidly become one of the most versatile and widely used storm-water, best management practices (BMPs) throughout the United States and many parts of the world. It has recently become identified as a preferred site practice for green building design and leadership in energy and environmental design (LEED) certification. Despite the rapid acceptance of this BMP throughout the United States, detailed performance information and related design guidance are not currently available for many regions.... [tags: bioretention, hydraulic performance, soil types]
1813 words (5.2 pages)
- Natural environment include plant and animal habitats that have been affected by drainage projects. Plant and animal species whether wild and non wild that lived in natural land face various problem due to drainage construction. Due to salt accumulation and toxic materials all aspects of the landscape were negatively influenced. Principally, morphology changes of land created undesirable condition by removing natural greenery. This mechanism led to increase erosion and loss of habitats for wild animals.... [tags: erosion, soil, contaminants]
606 words (1.7 pages)
- ... 7- Healthy places in living and working. 8- Demonstration of Corporate Social Responsibility. 9- Future-proofed assets. 10- Competitive advantage. The Advanced Technology Centre in Swinburne University is a reflection of green star which was completed by Kane constructions in January 2011 in 22,000m2. The ATC building was designed with significant sustainable features and it was the first building to achieve five green stars. However, Kane has promised its clients to minimise the environmental impact and achieving the sustainability by improving and preventing the pollution during the construction time.... [tags: kane constructions, demolition]
838 words (2.4 pages)
- ... Thus the shear strength measured at a water content equals to the liquid limit with 30o and 60o apex cones rounded up to one decimal places produces the same shear strength value of 1.7 kN/m2. Further investigation by Moon and White (1985) compared the LL test results of 30 samples performed with fall cone 30o apex angle, Casagrande 4-point and 1-point methods. This showed that the mean values of tests performed by Casagrande methods provided consistent means, whereas those performed by cone penetration underestimates these by about 6%.... [tags: soil design parameters]
1610 words (4.6 pages)
- ABSTRACT “SIMULATION OF CONSTRUCTION ACTIVITES USING PROCESS SIMULATION SOFTWARE FOR EFFICIENCY IN COST, DURATION AND PRODUCTIVITY” A construction project involves numerous complex construction activities, which are influenced by uncertainties. A considerable number of activities cannot be experimented before the actual project because they would cost a noteworthy amount of time and money. These construction activities can be analyzed using simulation software packages. There are various simulation software packages available in the market.... [tags: Construction]
4329 words (12.4 pages)
- In the construction domain, the semantic web has been used in the field of construction education, supply chain, project and construction management, material storage, project design, architecture and graphic designs, etc. In the field of construction education, repositories have been developed in managing objects as well as metadata using ontologies that offers a set of services such as storing, retrieving and searching of learning objects using semantic web technologies(Ahmed et al. 2007; Pathmeswaran and Ahmed 2009; Argüello et al.... [tags: Construction]
672 words (1.9 pages)
- In building construction and in fire prevention there are organizations that have created a useful system on how to determine what type of building falls under which category. The ICC (International Code Council) and the NFPA (National Fire Protection Association) create these building codes for the safety of firefighters. The two most commonly known standards for building classifications are the NFPA 5000 and also the International Building Code (IBC). The two are very similar, however, they different on sub-categorizing.... [tags: Construction Architecture]
1692 words (4.8 pages)
Once the shuttle back to earth, Researchers have intended to investigate the recorded data in space, test the mortar to identify physical and mechanical properties and, finally, compare the test result with similar mortar fabricated in the same mixing chamber under similar conditions of temperature and pressure.
Few unclear points:
• Is it a good way to fabricate mortar in space under microgravity and all other tests on earth under gravity? Will these tests give representative results while use in space?
• Is it a sufficient curing time (just 9 days) for mortar to gain full strength while on earth it may take more than a month under normal conditions?
• To my knowledge, in microgravity environment, all the materials feel like weightless. In mixing chamber, if all the materials are weightless, is it possible to produce uniform and homogenous mortar?