<p>At this time, plastic is a material that is needed by the wider community and its impact is also extraordinary after the plastic is used in everyday life which can cause serious problems if the management is not done properly. The problem of plastic waste does not only occur in the city of Semarang, but also in other cities, so that the Ministry of Environment and Forestry to impose a program to use paid plastic bags in the short term. But this is only to deal with problems in the short term. In the long run, it will not solve the problem of "plastic waste", because the policy actually encourages people to buy plastic which, of course, will add a new burden on the community to buy it. The results showed that the compressive strength of light brick with the model / type of BN s.d. B10.0 with 10 variations of the mixture of the addition of plastic waste starting from (1.0 to 10.0)% to the weight of Portland Cement (PC) there is a decrease in the average compressive strength. The lowest was the addition of 10.0% plastic waste with an average compressive strength of 9.88 kg / cm². The regression equation obtained Y = 0.042 X ² - 1.177 X + 18.84 with a correlation value R ² = 0.934, meaning that the addition of plastic waste ranging from (1.0 to 10.0)% of the weight of Portland Cement (PC) has the effect of "very strong "against the compressive strength. So we can get a picture that by adding the addition of plastic waste affects the compressive strength decreases. So that it can be investigated with other compositions by adding Fly Ash and sand made with a mixture ratio of 1 PC: 2 Aggregate (Sand and Fly Ash), with the hope that this Fly Ash waste can also be used for lightweight brick building elements</p>
At present, plastic is a material that is needed by the community at large, where the impact is also very extraordinary after the plastic is used in everyday life which can cause serious problems if the management is not done properly. The problem of plastic waste does not only occur in the city of Semarang, but also in other cities, so that the Ministry of Environment and Forestry has implemented a paid plastic bag program in the short term. But this is only to deal with problems in the short term. In the long run, it will not solve the problem of "plastic waste", because the policy actually encourages people to buy plastic which, of course, will add a new burden for the community to buy it. Based on the above problems, it is necessary to utilize this plastic waste to be made into road pavement materials such as in the manufacture of Asphal Concrette Wearing Course, by making 5 mixed variations ranging from (2 to 10)% of the weight of the aggregate . This research was initiated through a survey process, material procurement, testing of stacking materials, making test specimens, testing specimens. The results of the research can show that the type of Thermosetting plastic waste has a significant influence on the Asphalt Concrete mixture AC-WC heat mixture, including: Density, Marshall Stability, Flow, VIM, VMA, MQ and the remaining Marshall Stability tend to show an increase, moderate VFA and VIMrefusal Density values tend to show a decrease. Thus the plastic waste from the Thermosetting type can be used as a partial replacement of the aggregate for the Asphalt Concrete mixture AC-WC heat mixture with a plastic waste content is limited to a maximum of 10% and at an optimum asphalt content of 5.55%. Thus this research is expected to be of benefit to the industry and the people of Semarang in relation to the use of plastic waste for road pavement.
Bata beton geopolimer adalah batu bata beton yang pembuatannya menggunakan mortar geopolimer. Bata beton geopolimer yang dikaji dibuat dengan memanfaatkan botom ash sebagai agregat pengisi dan fly ash sebagai perekat pengganti semen yang direaksikan dengan NaOH dan Na SiO 2 hingga terjadi polimerisasi yang memiliki sifat merekat. Disisi lain PLTU Tanjung jati merupakan pembangkit listrik cukup besar, menghasilkan limbah sisa pembakaran batu bara sebagai bahan energi berupa fly ash dan botom ash. Tiap hari volume limbah berupa fly ash dan bottom ash di PLTU Tanjung Jati kurang lebih 1.000 ton perhari dan limbah ini tergolong limbah B3.Upaya mengatasi masalah limbah fly ash dan bottom ash, salah satu alternatif yang di kaji dengan dibuat Bata geopolimer. Fly Ash dimanfaatkan sebagai bahan pengikat dan botom ash sebagai bahan pengisi, fly ash direaksikan dengan NaOH dan Na SiO 2. menjadi binder kemudian ditambahkan bottom ash kemudian dicetak menjadi benda uji bata beton geopolimer. Bata sebagai benda uji dibuat dengan komposisi; 1 binder : 3 agregat dan 1 binder : 4 agregat, sedangkan untuk bindernya ada 2 variasi yaitu 16 molar dan 18 molar. Benda uji setelah mengeras dengan umur 28 hari kemudian dibakar dengan durasi pembakaran selama 1 jam, 2 jam, 3 jam dan 4 jam, setelah proses pembakaran dilanjutkan dengan uji kuat tekan, uji kembang susut volume, dan uji perubahan bobot isi, simpulan dari hasil analisis yang dilakukan adalah: Kuat tekan maximum terjadi pada binder 18 M dengan campuran 1 Fs : 3 Ba memiliki kekuatan 83,5 Kg/cm 2 ; Terjadi peningkatan kuat tekan akibat pembakaran pada semua tipe campuran; Pada campuran 1 fs : 3 Ba peningkatan kuat tekan maximum terjadi pada pembakaran 2 jam dan untuk campuran 1 fs : 4 Ba terjadi peningkatan kuat tekan maximum pada pembakaran selama 1 jam; Tidak ada beda bobot isi benda uji akibat pembakaran untuk semua jenis campuran; Terjadi pengembangan dan retak retak akibat pembakaran.
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