scholarly journals CHEMICAL AND PHYSICAL PROPERTIES OF COAL BOTTOM ASH–BASED ROOT MEDIA AND THEIR EFFECT ON POINSETTIA NUTRITIVE STATUS, GROWTH, AND FLOWERING

HortScience ◽  
1996 ◽  
Vol 31 (6) ◽  
pp. 912A-912
Author(s):  
Dharmalingam S. Pitchay ◽  
B.C. Bearce
Keyword(s):  
Physical Properties ◽  
Bulk Density ◽  
Bottom Ash ◽  
Coal Ash ◽  
Normal Range ◽  
Rooted Cuttings ◽  
Coal Bottom Ash ◽  
Water Capacity ◽  
Color Development ◽  
Root Media

Rooted cuttings of `Supjibi' poinsettia were potted in peat vermiculite, mixed with coal bottom ash at 0%, 25%, 50%, 75%, or 100% by volume. Values of pH were higher in media containing coal bottom ash. In general, pH increased for the first 4 weeks, during which time 50–100 ppm (N) fertilizer was being applied, decreased temporarily when 200 ppm fertilizer began, and then increased and stabilized for the last 5 weeks. At first, pH tended to be higher with increase in ash, but when 200 ppm fertilizer was begun, pH became the same in all coal ash levels. Once fertilization was stopped, pH tended again to be higher in ash media. Levels of EC remained low in all media when 50–100 ppm of fertilizer was applied, but increased after 200 ppm fertilizer was begun, increasing to excessive levels 2 weeks later. With more watering, EC declined in the 0% ash, but remained high in 50% to 100% ash media. Leaf Ca content increased with increase in media ash but was below the normal range in all plants. With increase in media ash, water capacity decreased, but bulk density increased. Bract color development in plants in ash media appeared delayed.

scholarly journals PERFORMANCE OF FOUR POINSETTIA CULTIVARS IN ROOT MEDIA CONTAINING COAL BOTTOM ASH OR AGED SAWDUST

HortScience ◽  
1996 ◽  
Vol 31 (6) ◽  
pp. 915B-915
Author(s):  
Mark D. Sherratt ◽  
Donna V. Coffindaffer-Ballard ◽  
Bradford C. Bearce
Keyword(s):  
Bottom Ash ◽  
Coal Ash ◽  
Normal Range ◽  
Coal Bottom Ash ◽  
Color Development ◽  
High K ◽  
Root Media

Four poinsettia cultivars were planted in root media containing 0%, 25%, or 50% (by volume) of coal bottom ash or aged hardwood sawdust. Bract color development in `Supjibi' was delayed in media containing sawdust or ash by up to 8–12 days. Bract color initiation of `Jingle Bells' and `Success' occurred earliest in media containing 25% sawdust, but color development was delayed in 50% coal ash. Color development in `Dark Red Hegg' was not affected by ash or sawdust. Analysis of combined leaves from all four cultivars showed Fe levels below normal where media contained sawdust. Leaf Mo concentrations increased with increased media sawdust to above the normal range, but Mn levels were below the normal range in sawdust media. Leaf Ca levels were below normal in all media, possibly due to excessively high K levels in media and leaves. When fertilizer concentration and frequency were adjusted to media EC levels, control media (0% ash or sawdust) required 100 ppm N once a week. Media containing sawdust required 300 ppm to maintain EC levels between 1.25–2.25 dS·m–1 and coal ash media were irrigated with water following the sixth week after planting due to EC levels >2.25.

scholarly journals 162 GROWTH AND FLOWERING RESPONSES OF `DARK RED HEGG' POINSETTIAS IN COAL ASH-AMENDED ROOT MEDIA TO 3 NUTRIENT SOLUTIONS IN A CLOSED-LOOP NUTRICULTURE SYSTEM

HortScience ◽  
1994 ◽  
Vol 29 (5) ◽  
pp. 452a-452 ◽  
Author(s):  
Kristen B. Engstrom ◽  
Susan G. Myers ◽  
Bradford C. Bearce
Keyword(s):  
Closed Loop ◽  
Bottom Ash ◽  
Coal Ash ◽  
Rooted Cuttings ◽  
Ph Values ◽  
Root Media ◽  
The Media ◽  
Nutrient Solutions ◽  
Fertilizer Solutions ◽  
Equal Height

Rooted cuttings of `Dark Red Hegg' poinsettia were potted in root media containing 0, 50, or 100 percent by volume of coal bottom ash in peat::vermiculite (50:50, v/v), one cutting per 1 liter pot. The plants were placed in a closed loop nutriculture system and irrigated with 200 mg N.liter-1 of (N-P-K) 20-8.8-17.8. 15-2.2-22.25. or 20-4.8-21.6 (commercial Hydrosol + Ca(NO3)2). each with soluble trace elements. Fertilizer solutions were maintained at pH=6.0-6.5 and E.C.=1.6-2.5 dS.m-1. Media pH and E.C. tended to increase with amount of ash in the media. The 20-8.8-17.8 fertilizer reduced pH values 0.6-0.8 in all media. Plants were of equal height in all media. Average bract cluster diameters of plants in 100 percent coal ash were reduced compared to those in 0 and 50 percent coal ash by the 15-2.2-22.25 fertilizer. but not by the other two fertilizers. Plant top dry weights in 100 percent ash were reduced below those in 0 and 50 percent ash by the 20-8.8-17.8 and the 15-2.2-22.25 fertilizers.

scholarly journals Response of Three Poinsettia Cultivars to Root Media Containing Coal Bottom Ash

HortScience ◽  
1997 ◽  
Vol 32 (3) ◽  
pp. 484B-484
Author(s):  
James Gibson ◽  
Bradford C. Bearce
Keyword(s):  
Plant Tissue ◽  
Bottom Ash ◽  
Coal Ash ◽  
Leaf Tissue ◽  
Planting Date ◽  
Euphorbia Pulcherrima ◽  
B Values ◽  
Coal Bottom Ash ◽  
Root Media ◽  
Mean Diameter

Poinsettia (Euphorbia pulcherrima Willd. Ex Klotsch) cultivars `Dynasty Red', Nutcracker Pink', and `Annette Hegg Topwhite' were planted in 15-cm azalea pots containing peat: vermiculite (1:1, v:v) in which coal bottom ash sieved through 6-mm mesh was mixed in proportions of 0%, 25%, or 50% by volume. Planting date was 23 July 1996, and pinch date was 25 Aug. Harvest date at anthesis was 16 Dec. Plant heights of all cultivars were increased in the ash media. L, a, and b, values measured with a Minolta CR-200 chroma meter differed very slightly among ash levels within cultivars. Mean per plant bract cluster count was very similar among ash levels and cultivars. Mean diameter of largest bract cluster was increased above that of 0% coal ash plants for `Topwhite' plants in 50% coal ash media. Mean per plant dry weights of all three cultivars were increased over those of control plants in both 25% and 50% coal ash media. Media pH increased with increase in ash, while EC tended to decrease. Media available Ca increased with ash increase, while Mg decreased and the same pattern was noted for leaf tissue Ca and Mg. This was probably due to release of Ca from the ash, which contains about 10% Ca oxides. Tissue levels of Ca and Mg were within acceptable ranges; however, K levels also declined in plant tissue to suboptimal levels with plants in ash media.

Growth of Container-grown Plants With and Without Azomite Soil Amendment

HortScience ◽  
1998 ◽  
Vol 33 (3) ◽  
pp. 492c-492
Author(s):  
Chris Ely ◽  
Mark A. Hubbard
Keyword(s):  
Plant Growth ◽  
Physical Properties ◽  
Bulk Density ◽  
Soil Amendment ◽  
Extended Period ◽  
Mineral Elements ◽  
Field Soil ◽  
Rooted Cuttings ◽  
Sodium Calcium ◽  
Water Holding

Azomite is a mined, commercially available, hydrated sodium calcium aluminosiliclate soil amendment reported to act as a source of mineral elements. To determine its effect on plant growth, Dendranthema `Connie' rooted cuttings, Malus seedlings, and Citrus seedlings were grown in containers in one of two growing media: ProMix BX or ProMix BX with Azomite (1:1, v:v). Plant height was monitored weekly and after 6 weeks of growth, fresh and dry plant weights of roots and shoots were determined. There was no difference in any of the parameters measured as a result of the addition of Azomite. Any nutritional influence of the Azomite may only be evident in different conditions, e.g., field soil, or over an extended period of time. The Azomite altered the medium's physical properties and therefore bulk density and water-holding capacity of the Azomite were determined for consideration.

scholarly journals Reactivity of Ground Coal Bottom Ash to Be Used in Portland Cement

J ◽  
2021 ◽  
Vol 4 (3) ◽  
pp. 223-232
Author(s):  
Esperanza Menéndez ◽  
Cristina Argiz ◽  
Miguel Ángel Sanjuán
Keyword(s):  
Fly Ash ◽  
Coal Fly Ash ◽  
Bottom Ash ◽  
Blended Cement ◽  
Coal Ash ◽  
Pozzolanic Reaction ◽  
Natural Sand ◽  
Coal Bottom Ash ◽  
Novel Material ◽  
Pozzolanic Properties

Ground coal bottom ash is considered a novel material when used in common cement production as a blended cement. This new application must be evaluated by means of the study of its pozzolanic properties. Coal bottom ash, in some countries, is being used as a replacement for natural sand, but in some others, it is disposed of in a landfill, leading thus to environmental problems. The pozzolanic properties of ground coal bottom ash and coal fly ash cements were investigated in order to assess their pozzolanic performance. Proportions of coal fly ash and ground coal bottom ash in the mixes were 100:0, 90:10, 80:20, 50:50, 0:100. Next, multicomponent cements were formulated using 10%, 25% or 35% of ashes. In general, the pozzolanic performance of the ground coal bottom ash is quite similar to that of the coal fly ash. As expected, the pozzolanic reaction of both of them proceeds slowly at early ages, but the reaction rate increases over time. Ground coal bottom ash is a promising novel material with pozzolanic properties which are comparable to that of coal fly ashes. Then, coal bottom ash subjected to an adequate mechanical grinding is suitable to be used to produce common coal-ash cements.

scholarly journals Greenhouse Rose Production in Media Containing Coal Bottom Ash

1995 ◽  
Vol 13 (4) ◽  
pp. 161-164
Author(s):  
Susan H. Butler ◽  
Bradford C. Bearce
Keyword(s):  
Bottom Ash ◽  
Control Medium ◽  
Foliar Analysis ◽  
Flower Bud ◽  
Coal Bottom Ash ◽  
Root Media ◽  
Flower Stem ◽  
Control Root ◽  
Production Indices ◽  
One Year

Abstract Coal bottom ash was mixed with composted hardwood bark fines in proportions of 3:1, 2:1 and 1:1 (by vol) and with soil and peat in proportions of 1:1:1 (by vol). A mix of soil, sand and peat 1:1:1 (by vol) was used as the control root medium. Rosa × hybrida L. ‘Samantha’ plants were planted and cultured for one year and production indices recorded for four harvests. Flower stem lengths, flower bud diameters, production times, and numbers of flowers produced in media composed of ash and bark were equivalent to those in the control medium. Stem fresh weights of flowers produced in ash:bark media exceeded those in the control during third and fourth harvest. Foliar analysis showed increased B but decreased Mn and Cu in plants grown in the ash:bark media. Values of physical characteristics of all media were within acceptable ranges. Requirements for irrigation and fertilization were higher in the ash:bark media. The coal bottom ash:hardwood bark combinations showed potential as components of artificial root media for growing greenhouse roses.

scholarly journals Characteristics of Sulfur-Solidified Materials by the Physical Properties of Coal Bottom Ash

2014 ◽  
Vol 25 (1) ◽  
pp. 58-65
Author(s):  
Bumui Hong ◽  
Changsik Choi ◽  
Eunsuk Jang ◽  
Suk Soon Choi
Keyword(s):  
Physical Properties ◽  
Bottom Ash ◽  
Coal Bottom Ash

scholarly journals Penggunaan Abu Dasar Batubara Sebagai Pengganti Sebagian Agregat Halus pada Campuran Latasir B Terhadap Karakteristik Marshall

2015 ◽  
Vol 12 (2) ◽  
Author(s):  
Roza Gusman
Keyword(s):  
Power Plants ◽  
Thermal Power ◽  
Bottom Ash ◽  
Coal Ash ◽  
Asphalt Mixtures ◽  
Partial Replacement ◽  
Fine Aggregate ◽  
Coal Bottom Ash ◽  
Alternative Material ◽  
Total Proportion

Penggunaan Abu Dasar Batubara Sebagai Pengganti Sebagian Agregat Halus pada Campuran Latasir B Terhadap Karakteristik MarshallBasic Use of Coal Ash to Replace Some Fine Aggregate on Characteristics of Mixed Latasir B MarshallRoza Gusman1 & Alik Ansyori21,2Jurusan Teknik Sipil Fakultas Teknik – Universitas Muhammadiyah MalangAlamat korespondensi : Jalan Raya Tlogomas 246 Malang 65144AbstractCoal bottom ash is the residue from the burning of coal in thermal power plants. The use of coal bottom ash as an alternative material mix pavement is one way to take advantage of these residues. This study aimed to determine the effect of the use and the quantity of coal bottom ash as partial replacement of fine aggregate characteristics that meet the requirements for mixed marshall latasir B. Partial replacement of fine aggregate with coal bottom ash is made with a variation of 5%, 10%, 15%, 20%, 25%, 30%, and 35% of the total proportion of fine aggregate. Results of the study note that the use of coal bottom ash generally improves the quality mix latasir B. Latasir mixture B which has the characteristics of the best marshal is on the basis of coal ash content of 17.2%.Keywords: latasir B asphalt mixtures, coal bottom ash, marshall characteristics. AbstrakBottom ash batubara adalah residu dari pembakaran batubara di pembangkit listrik termal . Penggunaan batubara bawah abu sebagai alternatif campuran bahan perkerasan adalah salah satu cara untuk mengambil keuntungan dari residu tersebut . Penelitian ini bertujuan untuk mengetahui pengaruh penggunaan dan kuantitas bawah abu batubara sebagai pengganti parsial karakteristik agregat halus yang memenuhi persyaratan untuk campuran marshall latasir B. pengganti parsial agregat halus dengan bottom ash batubara dibuat dengan variasi 5 % , 10 % , 15 % , 20 % , 25 % , 30 % , dan 35 % dari total proporsi agregat halus . Hasil penelitian mencatat bahwa penggunaan bottom ash batubara umumnya meningkatkan kualitas campuran latasir B. Latasir campuran B yang memiliki karakteristik marshal terbaik adalah berdasarkan kadar abu batubara dari 17,2 % .Kata kunci : campuran aspal B latasir , bawah batubara abu , karakteristik marshall .

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