scholarly journals Pengaruh Penggunaan Hidrogen Peroksida Terhadap Kuat Tekan Bata Ringan

2021 ◽  
Vol 1 (1) ◽  
pp. 57-67
Author(s):  
Maya Rumiati ◽  
Reni Suryanita ◽  
Harnedi Maizir
Keyword(s):  
Mix Design

Kebutuhan bata yang terus meningkat membuat banyak alternatif pengganti bata yaitu bata ringan. Bata ringan merupakan inovasi dari bata konvensional yang memiliki densitas lebih ringan. Bata ringan dibuat dengan memasukkan gelembung-gelembung udara ke campuran semen saat proses pembuatan pasta semen sehingga menjadi lebih ringan dari pada bata konvensional oleh karena itu bata ringan banyak digunakan pada bangunan tinggi. Penambahan Hidrogen Peroksida (H2O2) dapat membuat busa sehingga dapat meringankan densitas bata ringan. Penelitian ini bertujuan untuk menganalisis kuat tekan bata ringan serta membandingkan keefektifan dengan atau tanpa penambahan H2O2 pada pembuatan bata ringan. Adapun pasir yang digunakan yaitu pasir Teratak Buluh, Kabupaten Kampar, Riau. Benda uji dibuat dalam spesifikasi ukuran kubus dengan sisi 10 cm. Dilakukan variasi penambahan H2O2 0%; 0,5%; 1,0%; 1,5%; 2,0% dan 2,5% terhadap berat semen. Sebelum dimulai pembuatan benda uji terlebih dahulu dilakukan pengujian karakteristik agregat halus lalu dibuat job mix design, setelah itu maka dapat dilakukan pembuatan dan perawatan benda uji dengan jumlah total 36 benda uji. Selanjutnya dilakukan pengujian kuat tekan pada umur 3 hari,7 hari dan 28 hari. Hasil penelitian ini menunjukkan kuat tekan optimum didapatkan pada variasi 1,0% yaitu 1,185 MPa. Berdasarkan penelitian ini dapat disimpulkan bahwa dengan penambahan H2O2 dapat meningkatkan kuat tekan pada bata ringan sebesar 13,5%.

COMPARATIVE PERFORMANCE EVALUATION OF PMB and CRMB WITH PARTIAL REPLACEMENT OF BITUMEN (VG-30) USING MARSHALL MIX DESIGN METHOD-A REVIEW

2018 ◽  
Vol 5 (02) ◽  
Author(s):  
N. SATHEESHKANNA
Keyword(s):  
Performance Evaluation ◽  
Design Method ◽  
Mix Design ◽  
Partial Replacement ◽  
Comparative Performance

Waste generated from industries and from various places around us not only contains rubber or plastics but contains lot many harmful pollutants whichare hazardous if disposed continuously in open and leftto degrade in our environment.Our project aims to study properties of different materials which may help in utilising the waste as well as improve the quality of roads and make them efficient, stable, durable and long lasting. Some of the materials that we have studied and considered to be tested in the partial replacement of bitumen are PMB and CRMB.

Effect of mechanical restraint on the rate of corrosion in concrete

1998 ◽  
Vol 25 (1) ◽  
pp. 81-86 ◽  
Author(s):  
N Hearn ◽  
J Aiello
Keyword(s):  
Mix Design ◽  
Concrete Repair ◽  
Accelerated Corrosion ◽  
One Dimensional ◽  
Mechanical Restraint ◽  
Corrosion Rates ◽  
Accelerated Corrosion Tests ◽  
The Matrix ◽  
The Relationship

Experimental work on prismatic concrete specimens was conducted to determine the relationship between mechanical restraint and the rate of corrosion. The current together with the changes in strain of the confining frame were monitored during the accelerated corrosion tests. The effect of mix design and cracking on the corrosion rates was also investigated. The results show that one-dimensional mechanical restraint retards the corrosion process, as indicated by the reduction in the steel loss. Improved quality of the matrix, with and without cracking, reduces the rate of steel loss. In the inferior quality concrete, the effect of cracking on the corrosion rate is minimal.Key words: corrosion, concrete, repair.

scholarly journals Mortars with Recycled Aggregates from Building-Related Processes: A ‘Four-Step’ Methodological Proposal for a Review

2021 ◽  
Vol 13 (5) ◽  
pp. 2756
Author(s):  
Federica Vitale ◽  
Maurizio Nicolella
Keyword(s):  
Building Materials ◽  
Thermal Analyses ◽  
Construction Materials ◽  
Physical And Mechanical Properties ◽  
Research Trends ◽  
Mix Design ◽  
Recycled Aggregates ◽  
Design Parameters ◽  
Natural Aggregates ◽  
By Products

Because the production of aggregates for mortar and concrete is no longer sustainable, many attempts have been made to replace natural aggregates (NA) with recycled aggregates (RA) sourced from factories, recycling centers, and human activities such as construction and demolition works (C&D). This article reviews papers concerning mortars with fine RA from C&D debris, and from the by-products of the manufacturing and recycling processes of building materials. A four-step methodology based on searching, screening, clustering, and summarizing was proposed. The clustering variables were the type of aggregate, mix design parameters, tested properties, patents, and availability on the market. The number and the type of the clustering variables of each paper were analysed and compared. The results showed that the mortars were mainly characterized through their physical and mechanical properties, whereas few durability and thermal analyses were carried out. Moreover, few fine RA were sourced from the production waste of construction materials. Finally, there were no patents or products available on the market. The outcomes presented in this paper underlined the research trends that are useful to improve the knowledge on the suitability of fine RA from building-related processes in mortars.

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