Foam mortar can be used as an alternative to cement board mixtures in ceiling or ceiling construction. The purpose of this study was to obtain the physical and mechanical properties of lightweight foamed cement board, to analyze the effect of admixture on bending strength, and to determine the optimum admixture for lightweight foamed cement board. The study used an experimental method by molding cement board test objects. The independent variable for the composition of the mixture with a ratio of 1 Cement: 1.2 Sand: 0.47 w/c ratio, with a mortar ratio of 0.45: 0.55; 31% glass fiber and 1:30 foam agent as well as 6 different admixture variations, namely 0; 0.2; 0.4; 0.6; 0.8 and 1.0%. The dependent variables are density, specific gravity, strength of nailed, and bending strength. The results showed that the higher the admixture content, thee workability. Density and specific gravity are decreasing. Meanwhile, the strength of the cement board is nailed, it does not break, there are no surface cracks, and the nails are easy to pull out. Bending strength was increasing and the optimum at 0.8% admixture variation was 60.44 kg/cm2. For the long term, the composition of this foam mortar mixture can be used as a ceiling

Penelitian ini bertujuan untuk mengevaluasi penggunaan Wetfix BE pada beton aspal campuran panas bergradasi superpave untuk lapis aus perkerasan lentur, dilihat dari aspek mutu, yaitu karakteristik Marshall, deformasi dan kekesatan permukaan, serta biaya. Pada penelitian ini variasi penggunaan Wetfix BE yang di gunakan adalah 0.0%, 0.2%, 0.3%, dan 0.4% dari KAO 6%. Dari hasil penelitian yang didapat penggunaan Wetfix BE dalam campuran aspal tidak sepenuhnya meningkatkan nilai karakteristik Marshall karena ada beberapa sifat Marhall seperti pelelehan dan Marshall Quotient yang tidak memenuhi spesifikasi. Nilai Mu-Meter untuk campuran tanpa dan dengan menggunakan Wetfix BE memenuhi persyaratan, yaitu lebih dari 0.33 Mu-Meter, dengan demikian maka permukaan jalan memiliki tahanan gesek antara ban dan permukaan jalan yang cukup baik. Dari hasil pengujian alur roda pada suhu 60

Self Compacting Concrete (SCC) as one type of concrete that is mostly used in building construction has good workability and can be obtained by adding filler instead of cement. Ground Granulated Blast Furnace Slag (GGBFS) has a chemical composition similar to the content in cement. Therefore, the study of the use of GGBFS was used as a partial substitute for cement in the SCC to examine the influences and quality of GGBFS on fresh concrete and to obtain SCC with the best compressive strength. This research method uses an experimental method by making SCC concrete specimens with an initial fas of 0.4 according to ACI 211.4R-93. The specimens were worked using GGBFS levels of 0%, until 80%, and using 1,4% superplasticizer, and 2% accelerator by weight of cement. The use of GGBFS at SCC can increase the value of compressive strength of about 4,27%-25,64 compared to SCC without using GGBFS. The resulted are known that GGBFS can influence compression strength. Based on the testing of fresh and hard concrete, it concluded that the best quality of SCC used 20% of GGBFS.

Reclaimed Asphalt Pavement (RAP) material as a result of road maintenance by Scrapping-Filling-Overlay method is a waste material which had potential to be recovered as a surface layerof road. The maintenance in highway road of Indonesia used hot mix asphalt in general. But, hot mix asphalt are not environmentally friendly and makes energy wasting because it needs burning process at mixing. Those things are the main causes of this research. This asphalt concrete with RAP with cold mixing is expected to fulfill the requirements of asphalt concrete for heavy traffic. In this research is asphalt content variations at 6,5; 7,0; 7,5; 8,0; and 8,5% to total mixture. The results of this research shows that the highest Marshall stability could not reach minimum value of heavy loaded traffic, that is at emulsion asphalt content 7% only for 711 kg. Besides, the percentage of void in mixture (VIM), void filled with bitumen (VFB) and flow couldn’t fulfill the specification of SNI 8198:2015. With the result that optimum asphalt content cannot be obtained. Result of wheel tracking test could not be obtained too because the specimens collapse during the test.Key words : Emulsion asphalt, Reclaimed Asphalt Pavement, stability, Wheel Tracking MachineABSTRAKMaterial Reclaimed Asphalt Pavement (RAP) hasil dari pemeliharaan dengan metode Scrapping-Filling Overlay merupakan limbah yang berpotensi untuk dimanfaatkan kembali menjadi lapis permukaan. Pada umumnya penanganan jalan di Indonesia menggunakan campuran panas. Namun, campuran panas kurang ramah lingkungan dan tidak hemat energi. Karena membutuhkan proses pembakaran dalam proses pencampuran. Hal ini yang menjadi alasan utama penelitian ini. Beton aspal dengan bahan utama RAP dengan campuran dingin ini diharapkan mampu memenuhi syarat lapisan aspal beton untuk lalu lintas berat. Variasi pada penelitian ini adalah kadar aspal 6,5; 7,0; 7,5; 8,0; dan 8,5% terhadap total campuran. Hasil dari penelitian menunjukan bahwa stabilitas Marshall tertinggi tidak mampu mencapai nilai minimum untuk lalu lintas berat, yaitu pada kadar aspal emulsi 7% hanya sebesar 711 kg. Selain itu prosentase rongga dalam campuran (VIM), rongga terisi aspal (VFB) serta kelelehan tidak memenuhi spesifikasi dari SNI 8198:2015. Sehingga, kadar aspal optimum tidak didapatkan. Hasil dari pengujian alur roda juga tidak didapatkan karena benda uji amblas ketika pengujian dilakukan.Kata kunci : Aspal emulsi, Reclaimed Asphalt Pavement, stabilitas, Wheel Tracking Machine

ABSTRAKPenggunaan batu bara untuk pembangkit listrik semakin meningkat mengakibatkan menumpuknya limbah bottom ash yang berbahaya untuk lingkungan sekitar. Penelitian ini bertujuan untuk menganalisa pengaruh campuran bottom ash terhadap sifat fisik dan mekanik mortar semen. Metode penelitian yang digunakan adalah metode eksperimental dengan perbandingan campuran yaitu 1PC: 3PS dan  variasi bottom ash sebesar 0%,20%,40%,60%,80% terhadap berat pasir. Hasil analisis menunjukkan penggunaan bottom ash menurunkan nilai konsistensi sebesar 1,82% sampai dengan 45,45% dibandingkan tanpa penggunaan bottom ash. Penggunaan bottom ash 20% mampu meningkatkan kuat tekan sebesar 50% dan kuat lentur sebesar 28,3% pada umur 28 hari dibandingkan mortar semen tanpa bottom ash. Mortar semen termasuk mortar tipe S sesuai SNI 03-6882-2002.Kata kunci: abu dasar, mortar semen, pengganti agregat halus ABSTRACTThe increasing use of coal for power generation results in the accumulation of bottom ash waste which is harmful to the surrounding environment. This study aims to analyze the effect of bottom ash mixture on the physical and mechanical properties of cement mortar. The research method used is an experimental method with a mixture ratio of 1PC: 3PS and bottom ash variations of 0%,20%,40%,60%,80% by weight of sand. The results of the analysis show that the use of bottom ash reduces the consistency value by 1.82% to 45.45% compared to without the use of bottom ash. The use of bottom ash 20% was able to increase the compressive strength by 50% and flexural strength by 28.3% at the age of 28 days compared to cement mortar without bottom ash. Cement mortar including type S mortar according to SNI 03-6882-2002.Keywords: bottom ash, cement mortar, substitute for fine aggregate