Supply ranges of stone blocks used in masonry bridges and their construction period along the East Royal Road in the Khmer Empire, Cambodia

Uchida, Etsuo; Sakurai, Yuichiro; Cheng, Rathborith; Shimoda, Ichita; Saito, Yu

doi:10.1186/s40494-020-00383-2

Heritage Science

Table 1 Median values of chemical compositions, magnetic susceptibilities and thickness of laterite blocks used for bridge construction along the East Royal Road

From: Supply ranges of stone blocks used in masonry bridges and their construction period along the East Royal Road in the Khmer Empire, Cambodia

Grouping	CISARK no.	Monuments	Cr (ppm)	Co (ppm)	Cu (ppm)	Y (ppm)	Zr (ppm)	Ti (ppm)	Sr (ppm)	Fe (ppm)	V (ppm)	As (ppm)	Zn (ppm)	M.S.*	Thickness (cm)
Precision			8.5	7.5	1.6	0.3	1.4	222	1	1084	8.6	1.6	1.4	0.001	0.5
Group A	2494	Sp. O Chungruk	252	124	163	8	159	6924	40	409642	1161	208	61	0.50	36.5
	3708	Sp. O Chattrea	318	135	140	14	131	8490	41	517535	1426	99	49	0.44	28
	3706	Sp.Khmeng	257	167	68	24	186	10232	89	400229	1382	44	89	0.44	34.5
	213	Sp. Khmeng	230	159	287	8	152	6557	37	494871	1416	67	62	0.53	29
Group B	7397	Sp. O Phdar	526	180	36	8	141	10752	67	497275	1814	39	28	1.29	31
	7081	Sp. Khmeng	425	230	110	7	130	11416	170	515340	1732	53	29	1.28	34.5
	2495	(no name)	589	225	94	7	126	11448	67	493618	1611	53	19	1.14	30
	2496	(no name)	648	246	131	9	110	11796	62	490763	1716	46	19	1.23	28
Group C	3705	(no name)	498	124	91	13	217	8447	141	316576	1058	27	57	0.52	27.5
	3707	Sp. Rontadev	489	133	93	14	237	9787	143	301240	1391	57	58	0.46	29.5
	1600	Sp. Phum O	245	99	85	21	265	12295	141	235661	978	52	63	0.45	34
	3701	Sp. Tradaev	298	102	84	13	228	7102	125	244007	840	45	46	0.50	29
	1599	Sp. Khvav	470	108	87	14	245	11525	152	323235	1472	108	183	0.48	34.5
	225	Sp. Touch	910	179	46	16	275	9627	160	559457	2123	166	107	0.44	32
	319	Sp. Ta Ong	587	215	57	19	219	10936	217	472045	1709	166	84	0.44	34
	318	Sp. Khmeng	454	171	60	12	163	8161	168	422228	1394	135	60	0.50	30.5
Group D	2498	Sp. Toap Chey	621	205	79	4	138	11617	26	585268	2544	34	29	1.01	28
	3703	Sp. Yea Pun	394	190	84	4	162	8911	20	466086	2192	26	26	0.75	35
	3702	Sp. Khmeng	370	128	65	9	137	9175	30	328955	1740	20	32	0.84	31
	306	Sp. Khmeng	534	205	80	9	200	10613	47	535771	2424	67	72	1.21	27
	1974	Sp. Khmeng	311	187	42	9	158	8577	42	315716	1328	26	53	0.80	30
	5426	Sp. Khmeng	424	187	39	7	113	10237	33	376840	1420	49	46	0.39	36
	1025	Sp. Thmor Bay Kream	260	266	34	5	95	9528	10	450687	1411	29	18	0.80	29.5
	2695	(no name)	672	208	68	8	128	9977	22	555617	1921	38	31	0.55	29
Group E	466	Sp. Thmor Steung Touch	346	167	57	12	144	6928	136	298551	768	152	56	0.30	29.5
	Angkor monuments	Angkor Thom (outer enclosure)	274	136	44	17	124	5304	214	260241	604	326	41	0.22	30.5
		Prasat Suor Prat (S2,N3)	401	125	67	17	110	6759	132	281670	802	208	28	0.29	42
		Banteay Samre (outer enclosure)	472	144	52	19	132	6973	231	338433	1044	310	54	0.38	40
		Banteay Samre (inner enclosure)	165	138	73	17	111	4717	206	265561	562	275	85	0.30	32.5
		Chau Say Tevoda (outer enclosure)	392	168	89	11	120	6431	128	383051	851	178	58	0.45	24
		Ta Prohm (inner enclosure)	381	154	66	19	128	5637	190	297714	864	337	42	0.35	33
		Banteay Kdei (inner enclosure)	490	172	71	56	141	7029	177	233858	1393	176	47	0.36	36
		Thommanon (foundation)	365	199	72	19	116	7373	156	396912	1082	217	28	0.45	31
		Chau Say Tevoda (foundation)	357	201	83	15	129	6411	151	427471	686	198	74	0.53	N/A
		Angkor Wat (outer enclosure)	193	146	82	51	117	4235	180	137270	763	134	60	0.30	35

Chemical composition and magnetic susceptibility data used to group the bridges are surrounded by bold rectangular frames. The sequence of the bridges from to bottom corresponds to positions from east to west
*Magnetic susceptibility (10⁻³ SI units)

Back to article page