Studi Komparasi Antara Angkur Dari Baja Dan Kayu Untuk Prategang Pada Beton Bertulangan Limbah Ban

Salah satu cara pemusnahan limbah ban adalah penggunaan limbah ban di dalam beton. Penerapannya sebagai pentransfer gaya prategang pada balok beton menunjukkan bahwa ada peningkatan kapasitas lentur beton bila dibandingkan dengan beton tanpa tulangan limbah ban. Angkur yang digunakan berupa klem dari baja. Harga angkur besi ini masih mahal. Studi ini mencoba menggunakan angkur yang terbuat dari kayu sebagai pengganti angkur besi. Metode yang digunakan adalah memasang angkur kayu didalam beton. Hasilnya menunjukkan bahwa penggunaan angkur dari kayu pada beton mempunyai kapasitas lentur yang setara dengan angkur dari besi. Sehingga disimpulkan bahwa kayu layak digunakan sebagai angkur pada beton prategang bertulangan limbah ban

Pemanfaatan Pemotongan Ban Bekas Untuk Campuran Beton Serat Perkerasan Kaku

Basically, construction of road pavement has 2 (two) types, are rigid pavement and flexible pavement. Rigid pavement has many advantages: the design is simple, the maintenance is easy and it is suitable for heavy load traffic as well as for sub grade with low CBR value However, the main disadvantage of rigid pavement is its inflexibility because the flexural strength of concrete is low. To increase the flexibility of concrete, adding elastic material (waste tire) into concrete mixture is needed. This is very possible, because waste tire has high modulus of elasticity value and low density. This research is conducted to find the influence of waste tire fiber addition towards the increase of flexural strength and compressive strength of rigid pavement. This research uses tire shreds 4 mm x 4 mm x 60 in mm size which are mixed randomly into various concentrations. Concrete mechanic behaviors, flexural strength and compressive strength, are measured by testing cylinder and beam concrete specimens. The research results show that the addition of waste tire fiber can increase flexural strength of concrete up to 20.84% and compressive strength of concrete up to 4.73% higher than normal concrete when the waste tire fiber content is 0.75%

Waste Tire Application in Concrete Structures

The waste tire is produced more than 10 million tons every year in the world. This problem needs serious treatment to eliminate the waste tires. This work is aimed to recycle the waste tire in concrete as a reinforcement. The contribution of the waste tires in flexural strength capacity of concrete is investigated by using experimental work and numerical simulation. Since material is quite non-homogenous compared to the pure concrete, we use six concrete beam specimens with dimension 150 mm x 150 mm x 1000 mm to get better fitting results. One specimen is non reinforced concrete beam and five specimens are waste tires reinforced concrete beam. For each of the five specimen, the waste tire reinforcement is tensioned with 0%, 17%, 25%, 40% and 60% strain before casting the concrete. The flexural strength tests are conducted after 28 days concrete ages under three point loadings. After the test, we observe that the waste tire reinforcement together with pre-stress contribute significantly on the flexural strength of the concrete beam as predicted. Finally, to support the test, finite element analysis is performed as well in this work and compared with the experimental results