In this article the potentiality is proven for application of wastepaper sludge ash (WSA) as mineral powder for traditional hot asphalt concrete mix. For the comparative testing in this article the traditional limestone mineral powder is used. The chemical (oxide) composition of the aggregates was studied, while that was determined by means of DRON - 3.0 diffractometer. It was ascertained that CaO is present in wastepaper sludge ash in sufficient quantity, while it provides for utilization of this waste material as an aggregate for asphalt concrete.
Today there is a problem of rational use of coal coking by-products, which can be partially solved by obtaining a variety of polymeric materials on their basis. The presence of valuable reactive substances (indene, coumarone, styrene, etc.) in this type of raw materials contributes to the solving of the problem. An important aspect is the area of application of the resulting polymers.
The effect of factors on the process of obtaining phenol-cresol-formaldehyde resin (PhCR-F) has been studied. By using empirical evidence, the adequate experimental statistical-mathematical (ESM) model has been developed. Based on this model, the optimal values of the process factors for obtaining PhCR-F have been identified, bringing about both high yield and softening point of the resin. Data predicted on the basis of the ESM model were compared with empirical evidence about PhCR-F preparation.
The phenol-cresol-formaldehyde resin (PhCR-F) obtained from phenolic fraction of coal tar has been synthesized via the polycondensation method of “raw” phenols with formaldehyde. The modification of road bitumen by this resin was carried out. PhCR-F in different concentrations was found to be effectively used as a modifier of road bitumen. It was shown that PhCR-F is an effective adhesive additive for road bitumen. The structural types of the oxidized and modified bitumen were determined according to the group-chemical composition and calculated criteria.
In our time, the use of bitumen modified with epoxy compounds is considered as an
effective means of improving the durability of road pavement. Given the rather long duration
of modification of road bitumen epoxy rapeseed oil (EPO), we studied the processes of
modifying bitumen using ultrasonic cavitation. For research, road bitumen modified with
rapeseed oil epoxy using cavitation and without it. Cavitation in the process of modification of
road bitumen was used to reduce the modification time.
We have studied the properties of bitumen modified with epoxy on the basis of rapeseed oil. For experiments we used brand BND 90/130 bitumen, modified with the rapeseed oil (EPO) epoxy in different amounts and in different EPO inputs. Bitumen were analyzed by the following parameters: softening temperature, penetration, adhesion, duktylnist. Вивчено властивості бітумів, модифікованих епоксидами на основі ріпакової олії. Для дослідів використано дорожній бітум марки БНД 90/130, модифікований епоксидом ріпакової олії (ЕРО) в різних кількостях та різними способами введення ЕРО.
The actual problem of acid sludge utilization which is the wasted products of oil-refining industry is examined. The neutralization method of acid sludge in order to neutralize sulfonic acids and excess of sulphuric acid is studied. The results of the oxidation process study of neutralized acid sludge and its joint oxidation with oil tar are given. The possibility of acid sludge application for the bitumen production is established. Розглянуто актуальну проблему утилізації кислих гудронів, які є відходами нафтопереробної промисловості.
The analysis of the characteristics of petroleum bitumen that used in road construction are presented.The influence on the properties of crumb rubber bitumen is investigated.
Наведено аналіз характеристик нафтових дорожніх бітумів, що застосовуються в дорожньому будівництві. Досліджено вплив гумової крихти на властивості дорожніх бітумів.
Physico-chemical characteristics of three-component composition BNB 70/30 bitumen : linseed oil : SBS rubber have been investigated. The composition may be used for the production of rolled roofing, the installation of which does not require heating operation. The dependence of the softening temperature, ductility, penetration, adhesion, elasticity and water resistance of bitumen compositions on their structure has been examined.
The tar oxidation process has been studied at 523 K, air flow rate of 2.0; 2.5 and 5.0 h-1 and process time of 6, 9 and 12 h in the presence of 2.5; 5.0 and 7.5 mas % (to calculate for the raw material)of petroleum resin with fluorine atoms. The tar is the residue of black oil vacuum distillation obtained from the oils of Western-Ukrainian fields. The effect of process conditions on the characteristics of obtained bitumen has been determined. The structural-group composition of blown bitumen has been examined.