Community Skill Development for the Use of Galvalume Composite Concrete Materials for Building Structural Parts

Galvalume material is often known as Cold Formed Steel material. Galvalume is one component that is often used by the people of Indonesia as a building structure material. Galvalume is easy to use, easily available in the market, and relatively inexpensive. Mild steel profiles can be used instead of roof trusses made of wood and concrete. The problem so far is that innovation regarding the use of Galvalume material has not been widely used for building structures without being wrapped in concrete. In this study, a trial was conducted and the introduction of the application of the use of Galvalume to building structural materials. The methodology is carried out using galvalume which is made as a composite concrete stiffener. Composite concrete testing is only at the concrete compressive strength test stage. The results of the concrete panel test show that the galvalume material can be used and the workers who work on it are not too difficult to do.


Introduction
The development of the world of construction in the era of President Jokowi's administration is increasingly seen to be growing rapidly, this is in line with one of the policies carried out by the government in the field of human resource development so that it is skilled and competitive with the world community.Technological developments and building materials are increasingly varied and innovative.This of course requires special skills to master it.Indonesian people who are scattered in various distant islands have very different levels of diversity in skills and education.A very striking difference is the growth of educated and skilled people on the island of Java and outside Java.On the island of Java, people can obtain education and develop skills better than those outside Java.This 1265 (2023) 012013 IOP Publishing doi:10.1088/1755-1315/1265/1/012013 2 happens because the growth of cities in Java is faster than outside Java.On the other hand, the number of educational institutions, schools and universities is also more than outside Java.However, this does not mean that all Javanese people have high skills.All of this happened, because the level of income and opportunity to obtain education not all get.Low levels of education and skills usually occur in rural communities that are far from urban areas or lack attention from the city/regional government.
Through the education program established by the Government of Indonesia, namely Merdeka Belajar Kampus Merdeka programs (MBKM), the world of education, especially academics, can provide the knowledge and skills they have to be imparted to the community, students by collaborating with private partners.The findings indicated that there were eight Merdeka Belajar Kampus Merdeka programs, including the following: 1) student exchange, 2) internship/work experience, 3) teaching in educational institutions, 4) village projects, 5) research, 6) entrepreneurial activities, 7) independent studies, and 8) humanitarian projects.

Literature Study
Various material innovations in the implementation of research that has been carried out in the development of a product.Innovation in making paving as part of road pavement using bamboo material as an aggregate substitute [6].Another research on testing mild steel C Galvalum as a building structure [7].Innovation in the manufacture of precast hollow foundations that use plastic waste additives in the manufacture of concrete [8].The test was carried out by comparing ordinary concrete with plastic mixed concrete.Sampling for the manufacture and testing of panels with C Galvalume frames that can be used as a series of laying building walls [9].The innovation made is the use of C Galvalume material in the manufacture of building structural parts by integrating it into concrete or commonly known as composite concrete.Galvalume itself is a material that is often used by the people of Indonesia as a building structure material.Galvalume is easy to use, easily available in the market, and relatively inexpensive [10].
Bethlehem Steel introduced Galvalume coating to the construction industry in the early 1970s.Before Galvalume came along, most metal roofs were galvanized steel.However, because of Galvalume's superior durability and corrosion resistance, 90% percent of the metal roofing industry switched from galvanized substrates to Galvalume substrates in the mid to late 1990s [11].Galvalume combines three important high performance metals used in roofing namely steel, aluminum and zinc.The area of the sub-district and the percentage of the area of the sub-district in the Kedungkandang sub-district, especially the Cemorokandang sub-district, is 2.80 (Km2) in 2018.In the table above it can be seen that the unemployment rate in Malang City based on the level of education shows that there are still as many as 46542 unemployed people in 2021.The unemployment rate occurs in people who have education, especially higher education or do not have education [4].
In order to improve community skills in carrying out construction activities, there is already an Indonesian K3 Construction Regulation [  The largest skilled workforce management process is carried out outside Java, namely in the Riau Archipelago for schemes outside the main scheme.Meanwhile, for the management of skilled workers, the main scheme is only found in the city of Jakarta, the capital city of Indonesia.

Methodology
The methodology was carried out using C galvalume material which was made as a precast composite concrete panel frame.Manufacturing is done by teaching how to manufacture composite concrete panels from scratch, during testing and during implementation.Composite concrete testing was carried out in the Polinema laboratory, PPNS, De Montfort University UK and Narotama University.After the test is successful, the next step is to apply it in the field.The personnel involved consist of lecturers, students, communities, and implementation partners.Three samples of galvalume composite concrete panels were tested and the age of manufacture was 14 days.The test results of galvalume composite concrete panels using 6 diameter reinforcement at 14 days of age produced compressive strengths of 7,000 kg/cm2, 8,000 kg/cm2 and 7,800 kg/cm2.These results indicate that the concrete panels are strong enough to withstand the applied compressive loads.
After testing the panels can be selected with good quality results, precast panels are fabricated and then sent to the field.After preparing the panels according to the design determined, then other work is carried out so that a building is formed as shown below:

Conclusion
The resulting research conclusions are: 1. People's skills in recognizing work that feels new are known require guidance to be able to master the work being done.2. The role of mentors carried out by lecturers by involving students and private partners will complement each other to realize the implementation of work as well as provide special skills in a short time to the community.3. The material for making building structural panels by combining other commonly known materials will provide added value for all parties introduction of the C Galvalum material type to be used as an innovative.4. The test results of galvalume composite concrete panels using 6 diameter reinforcement at 14 days of age produced compressive strengths of 7,000 kg/cm2, 8,000 kg/cm2 and 7,800 kg/cm2.5.During this activity, at the same time realizing the implementation of the MBKM Indicators which can be carried out well and with good results.6.The recommendation from the research is that it is necessary to test and develop the use of C Galvalum as part of the composite concrete structure of buildings and training in skills for using it for the community.

Fiure 12 .
Figure 13.Before After the Work on the Results of Building Structures The Faculty of Teacher Training and Education has run a student exchange program with another university, a teaching assistant program in educational institutions, and a program to build villages/thematic lectures for students and lecturers who passed the selection process for a grant program called "Kampus Mengajar" [5].Through the role of lecturers in carrying out the Tridharma of Higher Education by carrying out innovations in the field of construction, Merdeka Belajar Kampus Merdeka programs (MBKM) activities can be carried out.One of the innovations made is the Utilization of Galvalume Composite Concrete Materials for Building Structure Parts.The use of type C galvalum material as a filler part makes building structures simpler for small-scale house construction.The selection of locations to provide learning about Community Skills Development Utilization of Galvalume Composite Concrete Materials for Building Structure Sections was carried out in Malang City, Cemorokandang Village, Malang.)

Unemployment in Malang City, East Java, and Indonesia by Education (Soul)
Law No. 2 of 2017 Concerning Construction Services Article 1 describes Security, Safety, Health and Sustainability Standards as technical guidelines for security, safety, health for construction work, and social protection for workers, as well as local environmental regulations and environmental management -in the implementation of Construction Services and Work Competency Certification in accordance with Indonesian national work competency standards, international standards, and/or special standards Skilled Construction Workers by Province 2018-2020 (BPS) in Indonesia [2].

Table 3 .
Skilled Construction Workers Skilled Construction Workers by Province 2018-2020 (BPS) in

Table 4 .
Most Cities Issued Skilled Construction Workers Certificates