Properties of oil well cement with high dosage of metakaolin

Bu, Yuhuan; Du, Jiapei; Guo, Shenglai; Liu, Huajie; Huang, Chenxing

doi:10.1016/j.conbuildmat.2016.02.173

Cited by 85 publications

(53 citation statements)

References 30 publications

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“…Due to the advantageous capabilities, the pozzolanic material is a prospective substitution to ordinary Portland cement, [8] [9] [10]. Various factors show that the pozzolanic activity of a certain material depends mostly on its chemical and mineralogical composition, and moreover, on the amorphous phase content, the dihydroxylation degree, the material's specific surface, and the water to binder ratio of the blended mixtures, [11].…”

Section: S S Ibrahim Et Almentioning

confidence: 99%

Metakaolin as an Active Pozzolan for Cement That Improves Its Properties and Reduces Its Pollution Hazard

Ibrahim¹,

Hagrass²,

Boulos³

et al. 2018

JMMCE

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Prepared metakaolin produced by calcination of a kaolin sample at 750˚C after soaking for 5 hrs was tested as an active pozzolan for locally produced cement. Blended pastes of partially replaced ordinary Portland cement with different metakaolin amounts 5%, 10% and 15% were prepared, then they were hydrated with water for various time intervals of 1, 3, 7, 14 and 28 days. At each time interval, the hydrated paste specimens were tested for compressive strength, hydration kinetics and followed up using differential scanning calorimetry, X-ray diffractometry analyses and scanning electron microscopy techniques. Results showed that the blended pastes OPC-MK10 recorded the highest compressive strength values at all the hydration times reaching 33. 10, 86.40, 101.20, 112, and 122 MPa with increasing the age of hydration as compared with the neat samples which recorded 31.70, 65.20, 72.6, 82 and 101.30 MPa respectively. Meanwhile, the OPC-MK10 blend showed a decrease in the free CaO content reaching 4.07%, 4.27%, 4.23%, 4.19%, and 4.11% CaO with increasing age of hydration compared with the neat samples which recorded 4.27%, 5.15%, 5.42%, 5.61%, and 5.96% CaO respectively. The DSC thermograms results for the hardened neat and OPC-Mk10 pastes at the 14 and 28 hydration days showed the formation of hydrated materials mainly calcium silicate hydrates, calcium sulphoaluminate hydrates and calcium aluminates hydrates. The X-ray diffractometry analyses of both hardened neat and OPC-MK10 showed that, the intensity of calcium hydroxide peaks of OPC-MK10 was lower than in case of neat OPC, while the peak of the hydration products of calcium silicate hydrates and calcium aluminates silicate hydrates of OPC-MK10 samples were of higher intensity than in case of neat OPC. Scanning electron microscopy micrographs indicated the formation of denser microstructure for the hardened OPC-MK10 paste as compared to neat OPC pastes after the 28 days age of hydration.

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Section: S S Ibrahim Et Almentioning

confidence: 99%

Metakaolin as an Active Pozzolan for Cement That Improves Its Properties and Reduces Its Pollution Hazard

Ibrahim¹,

Hagrass²,

Boulos³

et al. 2018

JMMCE

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show abstract

“…38 Considering the complicated conditions in the downhole, temperature and pressure would be important factors affecting the cementing quality. 39 In a thermal recovery well, the oil well cement sets at low temperature at the beginning but then works at high temperatures for a long period during the production process. In consideration of this circumstance in the downhole, cement slurries were initially cured at 75 C at atmospheric pressure for 7 days, and then, these cement pastes were placed into the high temperature curing chamber at a temperature of 200 C and pressure of 10 MPa for 7 days, which could simulate the downhole condition.…”

Section: Sample Preparationmentioning

confidence: 99%

Experimental study on the thermal expansion property and mechanical performance of oil well cement with carbonaceous admixtures

Chang

et al. 2017

RSC Adv.

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“…Many additives have been proposed to improve the quality of Portland cement based on OWC. Addition of phosphogypsum (Hua, Wang and Yao, 2016) and meta-kaolin (Bu et al, 2016) decreases permeability of hardened OWC. Aluminum powder and nano meta-kaolin decrease the volume shrinkage, silica powder increases the strength and reduce the porosity (Costa et al, 2017;El-Gamal, Hashem and Amin, 2017;Liu, Bu and Guo, 2013), CaCL 2 or NaCl accelerates the hardening, bentonite decreases the slurry density and polypropylene glycol reduces the foam in the Portland a cement based the OWC (Broni-Bediako, Joel and Ofori-Sarpong, 2016), mullite (3Al 2 O 3 •2SiO 2 ) (Han, Chen and Li, 2007) and corundum (Chen et al, 2015) increase high-temperature strength.…”

Section: Introductionmentioning

confidence: 97%

Cement material development used for cementing underground coal gasification well

Huda

2018

IMJ

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The R&D Centre for Mineral and Coal Technology of the Ministry of Energy and Mineral Resources develops an underground coal gasification (UCG) technology including its UCG test in a coal mine at Musi Banyuasin regency, South Sumatra. The UCG is safer than the underground mine since there is no worker underground however there is a concern in risk of ground water pollution. One of the methods to reduce the risk is a proper installation of well casing and cementing that seal aquifer from contact with UCG product gas. Development of special cement for cementing UCG well is needed due to its high process temperature (up to 1300°C). The objective of this research is to develop a cement material that can withstand high temperatures environment. Domestically available an oil well cement (OWC) and a castables (CT) were used for the experiments. Single material of OWC is not suitable for cementing UCG well since the OWC compressive strength reduced drastically at heat treatment above 300°C due to decomposition of portlandite and calcium silicate hydrate. On the other hand, there was a synergistic effect that resulted of higher compressive strength sample if 60% weight of OWC and 40% weight of CT was blended. The absence of portlandite and the presence of inert filler materials in the blend is believed to improve thermal and mechanical properties of the blend. ABSTRAKPusat Penelitian dan Pengembangan Mineral dan Batubara, Kementerian Energi dan Sumber Daya Mineral sedang mengembangkan teknologi gasifikasi batubara bawah tanah (underground coal gasification/UCG) dan telah melakukan uji coba UCG di sebuah tambang batu bara di Musi Banyuasin, Sumatera Selatan. UCG lebih aman dibandingkan tambang bawah tanah karena tidak ada pekerja yang berada di bawah tanah tetapi ada resiko polusi air tanah akibat kegiatan UCG. Pemasangan casing dan penyemenan sumur akan mengurangi resiko tersebut tetapi karena proses UCG melibatkan suhu hingga 1300°C maka pengembangan semen yang tahan suhu tinggi untuk penyemenan sumur UCG perlu dikembangkan. Tujuan penelitian ini adalah mengembangkan bahan semen tahan suhu tinggi. Semen sumur minyak (oil well cement/OWC) dan castables (CT) yang dapat diperoleh di dalam negeri digunakan sebagai bahan penelitian. Hasil penelitian menunjukkan OWC kurang sesuai untuk penyemenan sumur UCG karena kuat tekannya menurun secara drastis pada suhu di atas 300°C. Hal ini terjadi karena awa-komposisi portlandit dan kalsium silikat hidrat pada suhu tersebut. Di lain pihak terjadi sinergi hasil blending 60% berat OWC dan 40% berat CT pada suhu perlakuan panas di atas 300 o C yang menghasilkan kuat tekan sampel lebih tinggi dibandingkan kuat tekan sampel OWC atau CT saja. Tidak adanya portlandit dan adanya bahan pengisi dalam campuran tersebut diperkirakan menjadi sebab terjadinya peningkatan kuat tekan semen hasil blending. Kata kunci: gasifikasi batubara bawah tanah, semen sumur minyak, castables, perlakuan panas

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Properties of oil well cement with high dosage of metakaolin

Cited by 85 publications

References 30 publications

Metakaolin as an Active Pozzolan for Cement That Improves Its Properties and Reduces Its Pollution Hazard

Metakaolin as an Active Pozzolan for Cement That Improves Its Properties and Reduces Its Pollution Hazard

Experimental study on the thermal expansion property and mechanical performance of oil well cement with carbonaceous admixtures

Cement material development used for cementing underground coal gasification well

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