Reviews on the Properties of Aggregates made with or without Geopolymerisation Method

Aggregates are popular for use in concrete and lightweight concrete applications. Recent research shows that the by-product materials such as fly ash can be used as raw material in producing aggregates and lightweight aggregates. The usage of this material can improve the quality of the aggregates produced compared to conventional in term of structurally strong, physically stable, durable, and environmentally inert. This paper summarized the process and mechanical testing on the fly ash aggregates and lightweight aggregates to be used in concrete

Pengaplikasian Lumpur Sidoarjo Kadar Tinggi Pada Mortar Dan Beton

Berbagaipenelitian mengenai pemanfaatan material lumpur Sidoarjo, khususnya sebagai material pengganti semen (pozzolan) telah dilakukan. Penelitian ini berfokus pada penggunaan lumpur Sidoarjo dengan kadar yang tinggi, yaitu >50%, serta membandingkan hasil tersebut dengan fly ash. Analisa terhadap materialdilakukan menggunakan XRF (X-Ray Flouresence) untuk mengetahui karakteristik dari material tersebut. Analisa juga dilakukan terhadap pengaruh ukuran butiranmenggunakan PSA (Particle Size Analysis).Lumpur dilakukan treatment dari pengeringan, pembakaran hingga digiling menggunakan bar-mill dengan lama penggilingan bervariasi untuk mendapatkan ukuran butiran berbeda. Presentase kadar yang digunakan adalah 50%, 55% dan 60% dari total cementitious material. Mortar dan beton digunakan ukuran 5x5x5 cm3 dan 15x15x15 cm3 lalu dilakukan pengujian berupa kuat tekan, workability dan setting time. Hasil menunjukkan semakin halus ukuran butiran, semakin tinggi kuat tekan dan workability-nya. Diantara kadar 50%-60% penggantian semen dengan lumpur Sidoarjo, kadar 50% merupakan yang paling efektif.Pada beton dengan lumpur Sidoarjo menghasilkan slump test sebesar 8,5 cm dengan kuat tekan 34,07 MPa pada umur 37 hari

Study on Radioactivity Components, Water Quality and Microstructure Characteristic of Volcano Ash as Geopolymer Artificial Aggregate

The assessments of radioactivity, water quality testing and microstructure characteristic of volcano ash have been examined. The measurement of the 226Ra, 232Th, 40K, and 238U were carried out using radioactive concentration value. The results showed that 226Ra = 39 Bq/kg, 232Th = 36 Bq/kg, 40K = 337 Bq/kg which are within acceptable limit for construction building. The radium equivalent activity for volcano ash is 116 ± 1 Bq/kg, means the exposure of γ radiation is safe. Water from volcano ash may affected the aquatic ecosystem and human health which is not safe to be used as effluent due to high zinc, cadmium, lead, cyanide and sulphide and exceed the allowable limits. The mean particle size of the volcano ash was 121 μm. This volcano ash is almost dominated by quartz phase. SEM analysis showed that volcano ash had a plate-like structure similar to kaolin. The FTIR adsorption band showed the OH-, H-O-H, Si-O, Al-OH, and Si-O-Si and Si-O-Al vibrations appeared in this volcano ash. The average total percentage of weight loss after being heated to 1000°C was 15.85

Reviews on the Properties of Aggregates made with or without Geopolymerisation Method

Aggregates are popular for use in concrete and lightweight concrete applications. Recent research shows that the by-product materials such as fly ash can be used as raw material in producing aggregates and lightweight aggregates. The usage of this material can improve the quality of the aggregates produced compared to conventional in term of structurally strong, physically stable, durable, and environmentally inert. This paper summarized the process and mechanical testing on the fly ash aggregates and lightweight aggregates to be used in concrete

Characterization of LUSI Mud Volcano as Geopolymer Raw Material A Review

The mud of mud volcano samples were collected from an eruption site named ‘LUSI’ (Lumpur “mud†–Sidoarjo), East Java, Indonesia for characterization. Analysis showed that, the major constituents of mud volcano are SiO2 and Al2O3 which is are higher than those in fly ash. The particle of mud volcano has a flake-shaped particle and the overall particle size is dominated by particles between 2.5µm – 25.0µm. The results of XRD shows that mud of mud volcano have a characteristic of structurally disordered compounds, and a set of peaks corresponding to minor crystalline phases such as quartz, feldspars, and kaolinite. FTIR adsorption bands of the raw material of mud volcano has the chemical bonding between bands 1-5

Assessment on the Potential of Volcano Ash as Artificial Lightweight Aggregates using Geopolymerisation Method

Following the Yogyakarta earthquake on May 27th, 2006, the subsequent eruption of a volcano mud has been closely observed and analyzed by the geological community. The volcano mud, known as LUSI (LUlumpur, SI-Sidoarjo), began erupting near the Banjarpanji-1 exploration well in Sidoarjo, East Java, Indonesia. LUSI offers a unique opportunity to study the genesis and development of a volcano mud. This paper summarizes the current knowledge about the potential of volcano ash as a raw material in geopolymer and as artificial aggregate. Previous experimental study shows that the volcano ash has a good performance when 5 and 10 OPC was replaced by volcano ash mixture. Volcano ash mixed with fly ash in certain composition has a potential to become a binder in geopolymer concrete. An effort to convert the volcano ash to artificial aggregate also shows good potential due to their specific gravity and water absorptions, and characterization of this material. The characterization of this material have been done through X-ray Fluorescence (XRF), X-ray Diffraction (XRD), Scanning Electron Micrograph (SEM), and Fourier Transform Infrared Spectroscopy (FTIR), and then compared to other materials. Sintered volcano ash showed good performance in terms of strength as a cement replacement material with OPC and fly ash. Volcano ash also showed good performance for porosity. This material has a potential as a raw material due to high compounds of SiO2 and Al2O3 in producing geopolymer composites, and as new artificial aggregate to be used in concrete application