The American Society for Testing and Materials (ASTM) is an independent organization devoted to the development of standards.

American Society for Testing and Materials

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Properties Of Concrete

Construction and demolition waste generation and properties of recycled aggregate concrete: A global perspective

A critical review and assessment for usage of recycled aggregate as sustainable construction material

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Design And Control Of Concrete Mixtures

Autogeneous shrinkage of mortars made with different types of slag cement

Corrigendum to Green geopolymer cement with dry activator from geothermal sludge and sodium hydroxide [J. Clean. Prod., vol. 293, 15 April 2021, 126143]

Pada daerah tarik, tulangan di dalam beton memiliki peranan yang sangat penting. Meskipun demikian, tegangan tarik yang terjadi ini bisa saja menyebabkan rentannya tulangan karena retak berpotensi menyebabkan korosi akibat terbukanya celah pada tulangan. Pada makalah ini, cairan mikroba yang terdiri dari bakteri dan jamur bersamaan digunakan untuk meningkatkan kemampuan tarik beton. Selain itu, diusulkan juga penggunaan pemanfaatan agregat kasar buatan (AB) yang mengandung mikroba untuk menggantikan agregat kasar natural (AN) dalam campuran beton pada daerah tarik beton. Cairan mikroba ditambahkan ke dalam campuran beton maupun AB sebanyak 400 hingga 6000 ml/m3. Pengujian kinerja AB dilakukan dengan menggunakan spesimen silinder untuk pengujian kuat tekan beton dan pengujian kuat tarik belah beton. Penambahan cairan mikroba terbukti dapat meningkatkan kuat tekan beton sebesar 12% dan kuat tarik belah beton sebesar 26% pada variasi AN 100%. Didapatkan hasil bahwa substitusi material AB dalam campuran beton dapat menurunkan kuat tekan beton, akan tetapi dapat meningkatkan kuat tarik belah sebesar 6,4% pada variasi 50% AB. Pengendapan mineral kalsium karbonat pada pori-pori di dalam beton serta adanya kapang akibat kerja jamur adalah penyebab meningkatnya lekatan pada matriks di dalam beton. Dibuktikan juga bahwa koloni bakteri bertambah di dalam beton terus bertambah yang berkontribusi pada peningkatan kepadatan beton.

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Papers

Autogeneous shrinkage of mortars made with different types of slag cement

Corrigendum to Green geopolymer cement with dry activator from geothermal sludge and sodium hydroxide [J. Clean. Prod., vol. 293, 15 April 2021, 126143]

Aplikasi mikroba dalam agregat buatan untuk meningkatkan kuat tarik belah beton mengandung fly ash

Geopolymer Haunch Beam‒Column Connection Behavior

Effect of Chloride Ions on Concrete with Geopolymer Coatings in Coastal Area