DAMPAK BANJIR CILEUNCANG TERHADAP KONDISI SOSIAL EKONOMI MASYARAKAT DI KECAMATAN RANCAEKEK KABUPATEN BANDUNG

Permasalahan banjir di Kecamatan Rancaekek merupakan masalah yang mulai disorot karena air bisa menggenang setinggi sekitar 50-70 cm. Hal tersebut menyebabkan berbagai permasalahan yang mengganggu masyarakat Kecamatan Rancaekek. Tujuan penelitian ini adalah., 1) Untuk menganalisis dampak banjir cileuncang terhadap kondisi sarana dan prasarana., 2) mobilitas harian masyarakat., 3) kondisi sosial ekonomi masyarakat., 4) Mengidentifikasi respon masyarakat terhadap bencana banjir di Kecamatan Rancaekek. Metode yang digunakan dalam penelitian ini adalah metode deskriptif. Pengambilan sampel wilayah dipilih empat desa yaitu Desa Linggar, Desa Sukamulya, Desa Bojongloa, dan Desa Jelegong. Kemudian pengambilan sampel manusia pada penelitian ini meliputi seluruh masyarakat yang bertempat tinggal di 4 desa tersebut. Hasil penelitian menunjukan bahwa., 1) banjir Cileuncang merusak sarana dan prasarana masyarakat., 2) mengganggu mobilitas harian masyarakat., 3) berdampak negatif terhadap kondisi sosial ekonomi masyarakat., 4) Respon masyarakat di lokasi penelitian untuk menghadapi banjir cileuncang menunjukan respon negatif karena seluruh masyarakat di Kecamatan Rancaekek tidak pernah melakukan tindakan antisipasi. Penelitian ini menghasilkan tingkat kesiapan masyarakat di Kecamatan Rancaekek dalam menghadapi masalah banjir Cileuncang. Rekomendasi mengenai permasalahan banjir cileuncang adalah sebaiknya masyarakat Kecamatan Rancaekek aktif berpartisipasi dalam usaha meminimalisir banjir Cileuncang karena permasalahan banjir Cileuncang bukan sepenuhnya tanggung jawab pemerintah. Kata Kunci : Banjir Cileuncang, sosial ekonomi, respon, Kecamatan Rancaekek The flood in Rancaekek District is a seriously problem, because the water can be pooled around 50 - 70 cm . Cileuncang flood is various problems for the people who living in Rancaekek District. This research purpose to., 1) to analyze the impact of cileuncang flood to facilities and infrastructure conditions., 2) the impact of cileuncang flood to people daily mobilities., 3) the impact of cileuncang flood to the social and economic conditions., 4) To identify the response of people to face up cileuncang flood. This research used descriptive method. The sample was taken from four village is Linggar Village, Sukamulya Village, Bojongloa Village , and Jelegong Village. Then the human sampling in this research is all the people who lives in four villages in Rancaekek District. The results of research is., 1) Cileuncang flood damage the facilities and infrastructure., 2) Cileuncang flood is very disturbing people daily mobilities., 3) Cileuncang flood affecting to social and economic conditions people who living there., 4) The response of the community in research to deal with the flood cileuncang is negative response. Recommendations for this problem is the people should be active to participate in effort to minimize flood cileuncang because the flood cileuncang problem Is not entirely the responsibility of government. Keywords : cileuncang flood , social economic, response, Rancaekek District

New physics searches using top quarks

This review summarizes recent searches for new physics at the Fermilab Tevatron Collider using final states involving top quarks and their analogues. The DØ and CDF Collaborations have used samples as large as 5 fb−1 to search for charged Higgs bosons, massive resonances decaying to t ¯t pairs, massive vector bosons decaying to t¯b final states, fourth-generation t' quarks and supersymmetric stop (˜t) quarks. These analyses have resulted in some of the most sensitive searches for new phenomena in the 1.96TeV ¯pp collisions

Alkali leaching from an ASR-affected dam

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Evaluation of different methods for the determination of the free alkali metal content in the pore solution of concrete

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Chloride binding in Portland composite cements containing metakaolin and silica fume

This paper investigates how the composition of Portland composite cements affects their chloride-binding properties. Hydrated cement pastes prepared with a reference Portland cement and composite Portland cements containing metakaolin and/or silica fume were exposed to NaCl or CaCl2 solutions. Chloride-binding isotherms were determined and the hydrate assemblage was investigated using TGA, XRD, 27Al NMR, 29Si NMR and thermodynamic modelling. Compared to the reference Portland cement paste, silica fume replacement did not alter the chloride-binding capacity. The metakaolin replacement resulted in the highest chloride-binding capacity. When combining silica fume with metakaolin, the chloride binding is similar to the reference Portland cement. In this study the differences in chloride binding were linked not only to changes in the AFm content, but also to alterations in the Al-uptake and chain length of the C(-A)-S-H

Durability testing of low clinker blends - chloride ingress in similar strength mortar exposed to seawater

Resistance to chloride ingress of ten different binders was investigated. Most of the binders were prepared with 35% substitution of a new clinker by limestone filler, calcined clay, burnt shale and/or siliceous fly ash. Mortar samples with similar design compressive strength after 90 days were exposed to artificial sea-water for 270 days. The results indicate that the use of alternative binders may lead to up to around 15% reduction in CO2 emission without compromising 90 days compressive strength and resistance to chloride ingress in marine exposure

Alkali metal distribution in composite cement pastes and its relation to accelerated ASR tests

Accelerated testing of alkali silica reaction (ASR) in concrete at elevated temperatures of 38 and 60 °C has an unknown impact on the alkali metal distribution in the cement paste. This paper investigates how the alkali metals released from hydrating Portland cement, limestone, and SCMs distribute between non-reactive and unreacted phases, C-A-S-H, and the pore solution. The SCMs investigated were fly ash and a volcanic pozzolan. The hydrate assemblage and pore solution of cement pastes cured at 20, 38 and 60 °C were analysed and related to the expansion of concrete prisms. There is little difference in alkali metal distribution at 20 and 38 °C, whereas curing at 60 °C has a large impact for the SCM containing blends. At alkali metal concentrations in the pore solution below 0.5 mol/L (Na + K) expansion of concrete was suppressed. Pore solution analysis could be used to screen new SCMs for ASR mitigation.publishedVersio

Screening of Low Clinker Binders, Compressive Strength and Chloride Ingress

This paper reports an initial screening of potential new binders for concrete with reduced CO2- emission. Mortars cured saturated for 90 days are compared with regard to a) compressive strength of mortars with similar water-to-binder ratio, and b) chloride ingress in similar design strength mortars exposed to seawater. The reference used was a binder composition typical for a Danish ready mixed concrete for aggressive environments and strength class C35/45. Based on the present investigation and assumptions up to around 15% reduction in CO2 emission from binder production might be obtained without compromising the 90 days compressive strength and resistance to chloride ingress in marine exposure by using selected alternative binders

Effect of leaching on the composition of hydration phases during chloride exposure of mortar

Mortar specimens were exposed to either a 3% NaCl solution or a 3% NaCl+KOH solution for up to 180 days. Exposure to the NaCl solution provoked much more leaching than the NaCl+KOH exposure. Leaching strongly impacted the chloride ingress profiles. The extended leaching led to a maximum total chloride content almost three times higher and a deeper chloride penetration than exposure with limited leaching after 180 days. The higher maximum chloride content seems to be linked to the enhanced binding capacity of the C-S-H and AFm phases upon moderate leaching as determined by SEM-EDS. The total chloride profile appears to be governed by multi-ion transport and the interaction of chloride with the hydration phases. Service life prediction and performance testing both rely on total chloride profiles and therefore ought to take these interactions into account.publishedVersio